@article{SponagelBecker1984,
  author    = {Sponagel, Stefan and Becker, E.},
  title     = {Reibungsfreie, ebene Diffusorstr{\"o}mung mit beliebigem Einlaufprofil. E. Becker, S. Sponagel},
  series = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik: ZAMM. 64 (1984)},
  journal   = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik: ZAMM. 64 (1984)},
  isbn      = {0044-2267},
  pages     = {T174 -- T177},
  year      = {1984},
  language  = {de}
}
@book{GruetersPeters1984,
  author    = {Gr{\"u}ters, Hugo and Peters, Norbert},
  title     = {Mechanik. Bd. 2 Dynamik. Peters, Norbert; Gr{\"u}ters, Hugo},
  publisher = {Inst. f{\"u}r Techn. Mechanik, RWTH Aachen},
  address   = {Aachen},
  pages     = {138, 13 S.: graph Darst.},
  year      = {1984},
  language  = {de}
}
@book{SimonisBruecher1984,
  author    = {Simonis, Rainer and Br{\"u}cher, Heiner},
  title     = {Verhalten von radioaktivem Krypton-85 in der Tiefsee : Abschlußbericht f{\"u}r d. Berichtszeitraum 1.10.1980 - 31.3.1983},
  publisher = {Zentralbibliothek d. Kernforschungsanlage},
  address   = {J{\"u}lich},
  pages     = {87 S.},
  year      = {1984},
  subject      = {Krypton-85},
  language  = {de}
}
@article{SponagelAkbay1984,
  author    = {Sponagel, Stefan and Akbay, U.},
  title     = {{\"U}ber den Relaxationseinfluß auf die Stabilit{\"a}t der ebenen Couette-Str{\"o}mung. Akbay, U. ; Sponagel, S.},
  series = {Rheologica Acta. 23 (1984), H. 2},
  journal   = {Rheologica Acta. 23 (1984), H. 2},
  isbn      = {0035-4511},
  pages     = {177 -- 184},
  year      = {1984},
  language  = {de}
}
@article{LaackRefischOhnsorgeetal.1984,
  author    = {Laack, Walter van and Refisch, A. and Ohnsorge, J. and D{\"u}rselen, L.},
  title     = {Proximaler Femurteilersatz - Alternative zum Schaftwechsel zementfixierter H{\"u}ftendoprothesen},
  series = {Orthop{\"a}dische Praxis. 20 (1984), H. 11},
  journal   = {Orthop{\"a}dische Praxis. 20 (1984), H. 11},
  isbn      = {0030-588x},
  pages     = {856},
  year      = {1984},
  language  = {de}
}
@article{Laack1984,
  author    = {Laack, Walter van},
  title     = {Juvenile Osteochondronekrosen - Wesen und m{\"o}gliche Entstehungsursachen},
  series = {Zeitschrift f{\"u}r Allgemeinmedizin ; ZFA. 60 (1984)},
  journal   = {Zeitschrift f{\"u}r Allgemeinmedizin ; ZFA. 60 (1984)},
  isbn      = {0341-9835},
  pages     = {1432},
  year      = {1984},
  language  = {de}
}
@inproceedings{BallmannRaatschenStaat1985,
  author    = {Ballmann, J. and Raatschen, Hans-J{\"u}rgen and Staat, Manfred},
  title     = {High stress intensities in focussing zones of waves},
  doi       = {10.1016/B978-0-444-42520-1.50015-3},
  year      = {1985},
  abstract  = {The propagation of mechanical waves in plates of isotropic elastic material is investigated. After a short introduction to the understanding of focussing of stress waves in a plate with a curved boundary the method of characteristics is applied to a plate of hyperelastic material. Using this method the propagation of acceleration waves is discussed. Based on this a numerical difference scheme is developed for solving initial-boundary-value problems and applied to two examples: propagation of a point disturbance in a homogeneously finitely strained non-linear elastic plate and geometrical focussing in al linear elastic plate.},
  subject      = {Technische Mechanik},
  language  = {en}
}
@article{StaatBallmann1985,
  author    = {Staat, Manfred and Ballmann, J.},
  title     = {Anisotrope Ausbreitung und Fokussierung von Beschleunigungswellen in vorgespannten nichtlinearelastischen Scheiben},
  series = {Wellenfokussierung, Kolloquium des SFB 27, RWTH Aachen},
  journal   = {Wellenfokussierung, Kolloquium des SFB 27, RWTH Aachen},
  address   = {Aachen},
  pages     = {140 -- 158},
  year      = {1985},
  language  = {de}
}
@article{SponagelAkbayBecker1985,
  author    = {Sponagel, Stefan and Akbay, U. and Becker, E.},
  title     = {Instability of plane Couette flow of viscoelastic liquids},
  series = {Journal of non-Newtonian fluid mechanics. 18 (1985), H. 2},
  journal   = {Journal of non-Newtonian fluid mechanics. 18 (1985), H. 2},
  isbn      = {0377-0257},
  pages     = {123 -- 141},
  year      = {1985},
  language  = {en}
}
@book{Simonis1985,
  author    = {Simonis, Rainer},
  title     = {Experimentelle Darstellung von Kr/Xe-Hydrat bei Dr{\"u}cken bis 160 bar},
  publisher = {Zentralbibliothek d. Kernforschungsanlage},
  address   = {J{\"u}lich},
  pages     = {Getr. Z{\"a}hlung : Ill., graph. Darst.},
  year      = {1985},
  subject      = {Krypton},
  language  = {de}
}
@article{Laack1985,
  author    = {Laack, Walter van},
  title     = {Experimentelle Untersuchungen {\"u}ber die Wirksamkeit verschiedener Schienbeinschoner im Fußballsport},
  series = {Zeitschrift f{\"u}r Orthop{\"a}die und Ihre Grenzgebiete. 123 (1985), H. 6},
  journal   = {Zeitschrift f{\"u}r Orthop{\"a}die und Ihre Grenzgebiete. 123 (1985), H. 6},
  isbn      = {0044-3220},
  pages     = {951 -- 956},
  year      = {1985},
  language  = {de}
}
@article{MuellerVeggianMorekBeuscheretal.1985,
  author    = {M{\"u}ller-Veggian, Mattea and Morek, T. and Beuscher, H. and Bochev, B.},
  title     = {In-beam study of the odd-odd nuclei ¹³⁴ La and ¹³⁶ La},
  series = {Nuclear physics / A, Nuclear and hadronic physics. 433 (1985), H. 2},
  journal   = {Nuclear physics / A, Nuclear and hadronic physics. 433 (1985), H. 2},
  isbn      = {0375-9474},
  pages     = {159 -- 180},
  year      = {1985},
  language  = {en}
}
@article{LaackDuerselen1985,
  author    = {Laack, Walter van and D{\"u}rselen, L.},
  title     = {Neues Konzept zur zementlosen Prothesenverankerung},
  series = {Orthop{\"a}dische Praxis. 21 (1985), H. 11},
  journal   = {Orthop{\"a}dische Praxis. 21 (1985), H. 11},
  isbn      = {0030-588x},
  pages     = {874},
  year      = {1985},
  language  = {de}
}
@article{Laack1985,
  author    = {Laack, Walter van},
  title     = {Untersuchungen {\"u}ber die Druckverteilung durch Schienbeinschoner im Fußballsport},
  series = {Deutsche Zeitschrift f{\"u}r Sportmedizin. 36 (1985), H. 7},
  journal   = {Deutsche Zeitschrift f{\"u}r Sportmedizin. 36 (1985), H. 7},
  isbn      = {0371-3059},
  pages     = {203 -- 208},
  year      = {1985},
  language  = {de}
}
@article{LaackRefisch1985,
  author    = {Laack, Walter van and Refisch, A.},
  title     = {Der akute und chronische Schulterschmerz / Refisch, A. ; Laack, W. van},
  series = {Deutsche Zeitschrift f{\"u}r Sportmedizin. 36 (1985), H. 6},
  journal   = {Deutsche Zeitschrift f{\"u}r Sportmedizin. 36 (1985), H. 6},
  isbn      = {0371-3059},
  pages     = {176 -- 183},
  year      = {1985},
  language  = {de}
}
@article{LaackDuerselen1985,
  author    = {Laack, Walter van and D{\"u}rselen, L.},
  title     = {Alternative zur dauerhaften Verankerung von Gelenkendoprothesen},
  series = {Zeitschrift f{\"u}r Orthop{\"a}die und ihre Grenzgebiete. 123 (1985), H. 4},
  journal   = {Zeitschrift f{\"u}r Orthop{\"a}die und ihre Grenzgebiete. 123 (1985), H. 4},
  isbn      = {0044-3220},
  pages     = {653},
  year      = {1985},
  language  = {de}
}
@article{Artmann1986,
  author    = {Artmann, Gerhard},
  title     = {A microscopic photometric method for measuring erythrocyte deformability. Artmann, Gerhard Michael},
  series = {Clinical Hemorheology. 6 (1986)},
  journal   = {Clinical Hemorheology. 6 (1986)},
  isbn      = {0271-5198},
  pages     = {617 -- 627},
  year      = {1986},
  language  = {en}
}
@book{Stulpe1986,
  author    = {Stulpe, Werner},
  title     = {Bedingte Erwartungen und stochastische Prozesse in der generalisierten Wahrscheinlichkeitstheorie : Beschreibung sukzessiver Messungen mit zuf{\"a}lligem Ausgang},
  address   = {Berlin},
  pages     = {199 S.},
  year      = {1986},
  language  = {de}
}
@article{HillenSchiebelZaengel1986,
  author    = {Hillen, Walter and Schiebel, U. and Zaengel, T.},
  title     = {Image quality in selenium-based digital radiography. Schiebel, U.; Hillen, W.; Zaengel, T.},
  series = {Medical Imaging},
  journal   = {Medical Imaging},
  pages     = {176},
  year      = {1986},
  language  = {en}
}
@article{Laack1986,
  author    = {Laack, Walter van},
  title     = {Physiotherapeutische Behandlung nach Gelenkoperationen},
  series = {Aktuelle Ergebnisse der Osteologie : Timmendorfer Strand, 21. - 23. November 1985 / hrsg. von P. Dietsch},
  journal   = {Aktuelle Ergebnisse der Osteologie : Timmendorfer Strand, 21. - 23. November 1985 / hrsg. von P. Dietsch},
  publisher = {de Gruyter},
  address   = {Berlin},
  isbn      = {3-11-011147-0},
  pages     = {XIV, 343 S. : Ill., graph. Darst.},
  year      = {1986},
  language  = {de}
}
@article{Laack1986,
  author    = {Laack, Walter van},
  title     = {Einfluß osteopathisch manipulativer Techniken auf die Muskulatur: Elektromyographische Untersuchungen},
  series = {Aktuelle Ergebnisse der Osteologie : Timmendorfer Strand, 21. - 23. November 1985 / hrsg. von P. Dietsch},
  journal   = {Aktuelle Ergebnisse der Osteologie : Timmendorfer Strand, 21. - 23. November 1985 / hrsg. von P. Dietsch},
  publisher = {de Gruyter},
  address   = {Berlin},
  isbn      = {3-11-011147-0},
  pages     = {XIV, 343 S. : Ill., graph. Darst.},
  year      = {1986},
  language  = {de}
}
@article{LaackRefisch1986,
  author    = {Laack, Walter van and Refisch, A.},
  title     = {Stellenwert der Kniegelenksarthroskopie aus diagnostischer und therapeutischer Sicht},
  series = {Aktuelle Ergebnisse der Osteologie : Timmendorfer Strand, 21. - 23. November 1985 / hrsg. von P. Dietsch},
  journal   = {Aktuelle Ergebnisse der Osteologie : Timmendorfer Strand, 21. - 23. November 1985 / hrsg. von P. Dietsch},
  publisher = {de Gruyter},
  address   = {Berlin},
  isbn      = {3-11-011147-0},
  pages     = {XIV, 343 S. : Ill., graph. Darst.},
  year      = {1986},
  language  = {de}
}
@article{Laack1986,
  author    = {Laack, Walter van},
  title     = {Allgemeine physiotherapeutische Behandlung nach H{\"u}ft- und Kniegelenkoperationen},
  series = {Physiotherapie. 77 (1986), H. 2},
  journal   = {Physiotherapie. 77 (1986), H. 2},
  isbn      = {0031-9392},
  pages     = {68 -- 72},
  year      = {1986},
  language  = {de}
}
@article{ArtmannTeitelSchmidSchoenbein1987,
  author    = {Artmann, Gerhard and Teitel, P. and Schmid-Sch{\"o}nbein, H.},
  title     = {Variable rheologische Antwort der Erythrozyten auf den Einfluß von Xantinderivaten (Coffein): Experimentelle Differenzierung von "Responders" und "Nonresponders"},
  series = {11. Jahrestagung der Gesellschaft f{\"u}r Mikrozirkulation},
  journal   = {11. Jahrestagung der Gesellschaft f{\"u}r Mikrozirkulation},
  publisher = {Karger [u.a.]},
  address   = {Basel [u.a.]},
  pages     = {100 -- 105},
  year      = {1987},
  language  = {de}
}
@article{ArtmannSchmidSchoenbein1987,
  author    = {Artmann, Gerhard and Schmid-Sch{\"o}nbein, H.},
  title     = {The microscope-photometrical-monolayer-technique- a new principle for analyzing the distribution of rheological responses in pathological and experimentally modified red cell populations. Artmann, Gerhard Michael; Schmid-Sch{\"o}nbein, H.},
  series = {Microcirculation, an update : proceedings of the Fourth World Congress for Microcirculation, Tokyo, Japan, July 26-30, 1987},
  journal   = {Microcirculation, an update : proceedings of the Fourth World Congress for Microcirculation, Tokyo, Japan, July 26-30, 1987},
  publisher = {Excerpta Medica},
  address   = {Amsterdam [u.a.]},
  isbn      = {0444809511},
  pages     = {475 -- 477},
  year      = {1987},
  language  = {en}
}
@phdthesis{Staat1987,
  author    = {Staat, Manfred},
  title     = {Nichtlineare Wellen in elastischen Scheiben},
  address   = {Aachen},
  pages     = {VIII, 197 S. : graph. Darst.},
  year      = {1987},
  language  = {de}
}
@article{Staat1987,
  author    = {Staat, Manfred},
  title     = {Anisotrope Wellenausbreitung in isotropen hyperelastischen Scheiben},
  series = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik : ZAMM. 67 (1987), H. 4},
  journal   = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik : ZAMM. 67 (1987), H. 4},
  isbn      = {0946-8463},
  pages     = {T241 -- T243},
  year      = {1987},
  language  = {de}
}
@article{Sponagel1987,
  author    = {Sponagel, Stefan},
  title     = {Analytische Berechnung von Gummi- Metall- Verbindungen},
  series = {Konstruktion : Zeitschrift f{\"u}r Produktentwicklung. 39 (1987), H. 4},
  journal   = {Konstruktion : Zeitschrift f{\"u}r Produktentwicklung. 39 (1987), H. 4},
  isbn      = {0373-3300},
  pages     = {151 -- 158},
  year      = {1987},
  language  = {de}
}
@article{SchaeferHagelskampMende1987,
  author    = {Sch{\"a}fer, Horst and Hagelskamp, B and Mende, H. H.},
  title     = {Streufeldkopplung zwischen geschichteten Transformator-M-Schnitten aus kornorientiertem und nicht-orientiertem SiFe-Material},
  year      = {1987},
  language  = {de}
}
@article{SchaeferMende1987,
  author    = {Sch{\"a}fer, Horst and Mende, H. H.},
  title     = {Stray field profile of grain-oriented rectangular 3\% SiFe sheets in dependence on vertical and in-plane magnetic fields},
  series = {Physica Status Solidi (A). 100 (1987), H. 2},
  journal   = {Physica Status Solidi (A). 100 (1987), H. 2},
  isbn      = {0031-8965},
  pages     = {621 -- 632},
  year      = {1987},
  language  = {en}
}
@book{Sponagel1987,
  author    = {Sponagel, Stefan},
  title     = {Gummi-Metall-Bauteile},
  address   = {Kaiserslautern},
  pages     = {126 S. : Ill., graph. Darst.},
  year      = {1987},
  language  = {de}
}
@article{SponagelKilthauSpies1987,
  author    = {Sponagel, Stefan and Kilthau, G. and Spies, K. H.},
  title     = {Sealing mechanism of lip seals},
  series = {Eleventh 11th International Conference on Fluid Sealing : proceedings of the 11th Internat. Conference on Fluid Sealing, held at Cannes, France 8 - 10 April, 1987 / organised and sponsored by BHRA, the Fluid Engineering Centre. Ed. B. S. Nau},
  journal   = {Eleventh 11th International Conference on Fluid Sealing : proceedings of the 11th Internat. Conference on Fluid Sealing, held at Cannes, France 8 - 10 April, 1987 / organised and sponsored by BHRA, the Fluid Engineering Centre. Ed. B. S. Nau},
  publisher = {Elsevier},
  address   = {London},
  isbn      = {3-540-51383-3},
  pages     = {748 -- 772},
  year      = {1987},
  language  = {en}
}
@book{Grueters1987,
  author    = {Gr{\"u}ters, Hugo},
  title     = {Mechanik: Vorlesung},
  publisher = {Becker-Kuns},
  address   = {Aachen},
  pages     = {253 S.: zahlr. graph. Darst.},
  year      = {1987},
  language  = {de}
}
@article{SponagelSpaltofski1987,
  author    = {Sponagel, Stefan and Spaltofski, R.},
  title     = {Hochmolekulare Zus{\"a}tze verbessern die Leichtlaufeigenschaft und die Tragf{\"a}higkeit von Schmierfilmen / Sponagel, S. ; Spaltofski, R.},
  series = {Mineral{\"o}ltechnik. 32 (1987), H. 3},
  journal   = {Mineral{\"o}ltechnik. 32 (1987), H. 3},
  isbn      = {0341-1893},
  pages     = {28 S.},
  year      = {1987},
  language  = {de}
}
@article{LaackAlbrecht1987,
  author    = {Laack, Walter van and Albrecht, T.},
  title     = {Ultraschalltherapie in der Praxis},
  series = {ZFA - Zeitschrift f{\"u}r Allgemeinmedizin},
  volume    = {63},
  journal   = {ZFA - Zeitschrift f{\"u}r Allgemeinmedizin},
  number    = {19},
  isbn      = {0341-9835},
  pages     = {605 -- 608},
  year      = {1987},
  language  = {de}
}
@article{LaackHennesRefisch1987,
  author    = {Laack, Walter van and Hennes, A. and Refisch, A.},
  title     = {Narkosemobilisation der Schultersteife (Periarthritis humeroscapularis ankylosans)},
  series = {Zeitschrift f{\"u}r Orthop{\"a}die und Ihre Grenzgebiete. 125 (1987), H. 6},
  journal   = {Zeitschrift f{\"u}r Orthop{\"a}die und Ihre Grenzgebiete. 125 (1987), H. 6},
  isbn      = {0044-3220},
  pages     = {669 -- 673},
  year      = {1987},
  language  = {de}
}
@article{LaackOhnsorge1987,
  author    = {Laack, Walter van and Ohnsorge, J.},
  title     = {Technik und Ergebnisse der arthroskopischen Fixation von Dissekaten an der medialen Femurrolle mit resorbierbaren EthipinR-Stiften},
  series = {Abstracts : SICOT 87, XVII. world congress, Munich, 16 - 21 August 1987 / [ed.: H. Wagner]},
  journal   = {Abstracts : SICOT 87, XVII. world congress, Munich, 16 - 21 August 1987 / [ed.: H. Wagner]},
  publisher = {Demeter},
  address   = {Gr{\"a}felfing},
  isbn      = {3-921512-85-9},
  pages     = {277},
  year      = {1987},
  language  = {de}
}
@article{Ziemons1987,
  author    = {Ziemons, Karl},
  title     = {Jet production and fragmentation properties in deep inelastic muon scattering},
  series = {Zeitschrift f{\"u}r Physik C : Particles and Fields},
  volume    = {36},
  journal   = {Zeitschrift f{\"u}r Physik C : Particles and Fields},
  number    = {4},
  isbn      = {0170-9739},
  pages     = {527 -- 543},
  year      = {1987},
  language  = {en}
}
@article{Stulpe1987,
  author    = {Stulpe, Werner},
  title     = {Conditional Expectations and Stochastic Processes in Quantum Probability},
  series = {Information complexity and control in quantum physics : proceedings of the 4. Internat. Seminar on Mathematical Theory of Dynamical Systems and Microphysics, Udine, Sept. 4 - 13, 1985 / ed. by A. Blaquiere ...},
  journal   = {Information complexity and control in quantum physics : proceedings of the 4. Internat. Seminar on Mathematical Theory of Dynamical Systems and Microphysics, Udine, Sept. 4 - 13, 1985 / ed. by A. Blaquiere ...},
  publisher = {Springer},
  address   = {Wien [u.a.]},
  isbn      = {3-211-81992-4},
  pages     = {223 -- 234},
  year      = {1987},
  language  = {en}
}
@book{Grueters1987,
  author    = {Gr{\"u}ters, Hugo},
  title     = {Aufgabensammlung Mechanik / von Hugo Gr{\"u}ters},
  publisher = {Becker-Kuns},
  address   = {Aachen},
  pages     = {Getr. Z{\"a}hlung : graph. Darst.},
  year      = {1987},
  language  = {de}
}
@misc{GrafGrossSponagel1987,
  author    = {Graf, G{\"u}nter and Groß, Heinz and Sponagel, Stefan},
  title     = {Verfahren zur Herstellung eines Dichtringes mit einer Dichtlippe : Patentschrift DE3621241C1 ; Ver{\"o}ffentlichungstag der Patenterteilung : 25.06.1987},
  publisher = {Deutsches Patent- und Markenamt},
  address   = {M{\"u}nchen},
  pages     = {5 S. : Ill.},
  year      = {1987},
  language  = {de}
}
@misc{SponagelGrafGross1987,
  author    = {Sponagel, Stefan and Graf, G{\"u}nter and Groß, Heinz},
  title     = {Verfahren zur Herstellung eines Dichtringes : Patentschrift DE3621242C1 ; Ver{\"o}ffentlichungstag der Patenterteilung : 25.06.1987 / Anmelder: Fa. Carl Freudenberg. Erfinder: G{\"u}nter Graf ; Heinz Groß ; Stefan Sponagel},
  publisher = {Deutsches Patent- und Markenamt},
  address   = {M{\"u}nchen},
  pages     = {5 S. : Ill.},
  year      = {1987},
  language  = {de}
}
@article{HillenSchiebelZaengel1987,
  author    = {Hillen, Walter and Schiebel, U. and Zaengel, T.},
  title     = {Imaging performance of a digital storage phosphor system},
  series = {Medical Physics. 14 (1987), H. 5},
  journal   = {Medical Physics. 14 (1987), H. 5},
  isbn      = {0094-2405},
  pages     = {744 -- 751},
  year      = {1987},
  language  = {en}
}
@book{Dikta1987,
  author    = {Dikta, Gerhard},
  title     = {Beitr{\"a}ge zur nichtparametrischen Sch{\"a}tzung der Regressionsfunktion},
  pages     = {81 S.},
  year      = {1987},
  language  = {de}
}
@article{LaackAlbrecht1987,
  author    = {Laack, Walter van and Albrecht, T.},
  title     = {Mikrobiologische Untersuchungen auf Keimfreiheit bei physikalischen Anwendungen},
  series = {Orthop{\"a}dische Praxis. 23 (1987)},
  journal   = {Orthop{\"a}dische Praxis. 23 (1987)},
  isbn      = {0030-588x},
  pages     = {73},
  year      = {1987},
  language  = {de}
}
@article{LaackRefisch1987,
  author    = {Laack, Walter van and Refisch, A.},
  title     = {Beeinflussen Beinhalter die Knieseitenbandstabilit{\"a}t bei der Arthroskopie?},
  series = {Orthop{\"a}dische Praxis. 23 (1987)},
  journal   = {Orthop{\"a}dische Praxis. 23 (1987)},
  isbn      = {0030-588x},
  pages     = {434},
  year      = {1987},
  language  = {de}
}
@article{LaackRefischVogel1987,
  author    = {Laack, Walter van and Refisch, A. and Vogel, P.},
  title     = {Polymyalgia rheumatica vom Beckeng{\"u}rteltyp: Eine seltene Differentialdiagnose der radikul{\"a}ren und pseudoradikul{\"a}ren Lumbalsyndrome. Fallbeschreibung und Literatur{\"u}bersicht / Refisch, A. ; Laack, W. van ; Vogel, P.},
  series = {Orthop{\"a}dische Praxis. 23 (1987)},
  journal   = {Orthop{\"a}dische Praxis. 23 (1987)},
  isbn      = {0030-588x},
  pages     = {567},
  year      = {1987},
  language  = {de}
}
@article{LaackAlbrechtCasser1987,
  author    = {Laack, Walter van and Albrecht, T. and Casser, H. R.},
  title     = {Ultraschalltherapie in der Praxis},
  series = {Physikalische Therapie in Theorie und Praxis},
  volume    = {8},
  journal   = {Physikalische Therapie in Theorie und Praxis},
  number    = {10},
  isbn      = {0178-9201},
  pages     = {628 -- 631},
  year      = {1987},
  language  = {de}
}
@article{Laack1987,
  author    = {Laack, Walter van},
  title     = {Tennisarm - Ursachen und Behandlung},
  series = {Apotheker-Journal . 9 (1987), H. 2},
  journal   = {Apotheker-Journal . 9 (1987), H. 2},
  isbn      = {0720-1028},
  pages     = {42},
  year      = {1987},
  language  = {de}
}
@article{StaatBallmann1988,
  author    = {Staat, Manfred and Ballmann, J.},
  title     = {Computation of impacts on elastic solids by methods of bicharacteristics},
  series = {Computational Mechanics '88 : theory and applications ; proceedings of the International Conference on Computational Engineering Science April 10-14, 1988, Atlanta, GA, USA ; vol. 2},
  journal   = {Computational Mechanics '88 : theory and applications ; proceedings of the International Conference on Computational Engineering Science April 10-14, 1988, Atlanta, GA, USA ; vol. 2},
  pages     = {1719 -- 1722},
  year      = {1988},
  abstract  = {Shock waves, explosions, impacts or cavitation bubble collapses may generate stress waves in solids causing cracks or unexpected dammage due to focussing, physical nonlinearity or interaction with existing cracks. There is a growing interest in wave propagation, which poses many novel problems to experimentalists and theorists.},
  subject      = {Bicharakteristikenverfahren},
  language  = {en}
}