@article{LaackRefisch1989,
  author    = {Laack, Walter van and Refisch, A.},
  title     = {Neuralgic amyotrophy of the lumbar area. Case Report / Refisch, A. ; Laack, W. van},
  series = {Archives of Orthopaedic and Trauma Surgery. 108 (1989), H. 5},
  journal   = {Archives of Orthopaedic and Trauma Surgery. 108 (1989), H. 5},
  isbn      = {0936-8051},
  pages     = {329 -- 332},
  year      = {1989},
  language  = {en}
}
@article{BaumannTillmannAletsee1989,
  author    = {Baumann, Marcus and Tillmann, U. and Aletsee, L.},
  title     = {Distribution of Carbon Among Photosynthetic End Products in the Bloom-Forming Arctic Diatom Thalassiosira antarctica COMBER / Tillmann, U. ; Baumann, M.E.M. ; Aletsee, L.},
  series = {Polar Biology. 10 (1989), H. 3},
  journal   = {Polar Biology. 10 (1989), H. 3},
  isbn      = {0722-4060},
  pages     = {231 -- 238},
  year      = {1989},
  language  = {en}
}
@article{Hanrath1989,
  author    = {Hanrath, Wilhelm},
  title     = {Character tables of some factor groups of space groups},
  series = {Perfect groups / Derek F. Holt and W. Plesken},
  journal   = {Perfect groups / Derek F. Holt and W. Plesken},
  publisher = {Clarendon Press},
  address   = {Oxford},
  isbn      = {0-19-853559-7},
  pages     = {357 -- 359},
  year      = {1989},
  language  = {en}
}
@article{WeberSchmittJahnetal.1989,
  author    = {Weber, Hans-Joachim and Schmitt, W. and Jahn, D. and Euringer, H.},
  title     = {Ein Versuch zur theoretischen Temperaturermittlung im Schneidbereich bei Bohrungen in kortikalem Knochen - An Experiment to Calculate the Theoretical Temperature at the Drill - Cortical Bone Interface / Schmitt, W. ; Weber, H. J. ; Jahn, D. ; Euringer, H.},
  series = {Biomedizinische Technik/Biomedical Engineering. 34 (1989), H. 3},
  journal   = {Biomedizinische Technik/Biomedical Engineering. 34 (1989), H. 3},
  isbn      = {0013-5585},
  pages     = {53 -- 56},
  year      = {1989},
  language  = {de}
}
@article{LaackCasser1989,
  author    = {Laack, Walter van and Casser, H. R.},
  title     = {Cortisonbedingte Ablederung der H{\"u}ftkopfkappe / Laack, W. van ; Casser, H. R.},
  series = {Neuere Ergebnisse in der Osteologie : Skelettwachstum, Endoprothetik, Glukokortikoide ; [15. - 18. Februar 1989 in G{\"o}ttingen] / H.-G. Willert ; F. H. W. Heuck (Hrsg.)},
  journal   = {Neuere Ergebnisse in der Osteologie : Skelettwachstum, Endoprothetik, Glukokortikoide ; [15. - 18. Februar 1989 in G{\"o}ttingen] / H.-G. Willert ; F. H. W. Heuck (Hrsg.)},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {3-540-51175-X},
  pages     = {566 -- 568},
  year      = {1989},
  language  = {de}
}
@article{Ziemons1989,
  author    = {Ziemons, Karl},
  title     = {An investigation of the spin structure of the proton in deep inelastic scattering of polarised muons and polarised protons},
  series = {Nuclear Physics B},
  volume    = {328},
  journal   = {Nuclear Physics B},
  number    = {1},
  isbn      = {0550-3213},
  pages     = {1 -- 35},
  year      = {1989},
  abstract  = {The spin asymmetry in deep inelastic scattering of longitudinally polarised muons by longitudinally polarised protons has been measured in the range 0.01<×<0.7. The spin dependent structure function g1(x) for the proton has been determined and, combining the data with earlier SLAC measurements, its integral over x found to be 0.126±0.010(stat.)±0.015(syst.), in disagreement with the Ellis-Jaffe sum rule. Assuming the validity of the Biorken sum rule, this result implies a significant negative value for the integral of g1 for the neutron. These integrals lead to the conclusion, in the na{\"i}ve quark parton model, that the total quark spin constitutes a rather small fraction of the spin of the nucleon. Results are also presented on the asymmetries in inclusive hadron production which are consistent with the above picture.},
  language  = {en}
}
@article{LueckGerlingPredel1989,
  author    = {L{\"u}ck, Reinhard and Gerling, Ulrich and Predel, Bruno},
  title     = {An entropy paradox of the association model},
  series = {Zeitschrift f{\"u}r Metallkunde : international journal of materials research and advanced techniques. Bd. 80, H. 4},
  journal   = {Zeitschrift f{\"u}r Metallkunde : international journal of materials research and advanced techniques. Bd. 80, H. 4},
  issn      = {0044-3093 ; 0179-4841},
  pages     = {270 -- 275},
  year      = {1989},
  language  = {en}
}
@article{SaffeLodewiksHaasetal.1989,
  author    = {Saffe, P. and Lodewiks, J. and Haas, H.-J. and Feigel, H.-J. and Ulrich, H. and Mauer, J. and Ortwig, H. and Dahmann, Peter and Rotth{\"a}user, S. and Tao, J. and Ohlischl{\"a}ger, O. and Scholz, D. and Bergmann, M. and Anders, P.},
  title     = {Neues von ASB Antreiben - Steuern - Bewegen},
  series = {{\"O}lhydraulik und Pneumatik. Vol. 33 (1989), H. 7},
  journal   = {{\"O}lhydraulik und Pneumatik. Vol. 33 (1989), H. 7},
  issn      = {0341-2660},
  pages     = {550 -- 572},
  year      = {1989},
  language  = {de}
}
@article{PeekenBennerPlatt1989,
  author    = {Peeken, Heinz and Benner, Joachim and Platt, Werner},
  title     = {Ausfallkriterien elastomerbest{\"u}ckter Wellenkupplungen},
  series = {Antriebstechnik : Konstruktion, Entwicklung und Anwendung von Antrieben und Steuerungen ; Organ der Forschungsvereinigung Antriebstechnik e.V.},
  volume    = {28},
  journal   = {Antriebstechnik : Konstruktion, Entwicklung und Anwendung von Antrieben und Steuerungen ; Organ der Forschungsvereinigung Antriebstechnik e.V.},
  number    = {11},
  publisher = {Vereinigte Fachverl.},
  address   = {Mainz},
  issn      = {0341-2652},
  pages     = {85 -- 88},
  year      = {1989},
  language  = {de}
}
@article{Benner1989,
  author    = {Benner, Joachim},
  title     = {Schwingungsbelastung von drehzahlgeregelten Antrieben mit Stromrichtermotoren},
  series = {Antriebstechnik : Konstruktion, Entwicklung und Anwendung von Antrieben und Steuerungen ; Organ der Forschungsvereinigung Antriebstechnik e.V.},
  volume    = {28},
  journal   = {Antriebstechnik : Konstruktion, Entwicklung und Anwendung von Antrieben und Steuerungen ; Organ der Forschungsvereinigung Antriebstechnik e.V.},
  number    = {12},
  publisher = {Vereinigte Fachverl.},
  address   = {Mainz},
  issn      = {0341-2652},
  pages     = {49 -- 54},
  year      = {1989},
  language  = {de}
}
@article{Meliss1989,
  author    = {Meliß, Michael},
  title     = {Regenerative Energiequellen},
  series = {Brennstoff, W{\"a}rme, Kraft : BWK ; das Energie-Fachmagazin. Bd. 41 (1989), H. 4},
  journal   = {Brennstoff, W{\"a}rme, Kraft : BWK ; das Energie-Fachmagazin. Bd. 41 (1989), H. 4},
  issn      = {0006-9612 (Print) ; 1436-4883 (E-Journal)},
  pages     = {146 -- 151},
  year      = {1989},
  language  = {de}
}
@article{Meliss1989,
  author    = {Meliß, Michael},
  title     = {Regenerative Energiequellen. Technischer Stand und Wirtschaftlichkeit},
  series = {Energiewirtschaftliche Tagesfragen. Jg. 39 (1989), H. 1/2},
  journal   = {Energiewirtschaftliche Tagesfragen. Jg. 39 (1989), H. 1/2},
  issn      = {0013-743X ; 0720-6240},
  pages     = {18 -- 25},
  year      = {1989},
  language  = {de}
}
@article{Meliss1989,
  author    = {Meliß, Michael},
  title     = {Photovoltaik bietet gr{\"o}ßtes Potential. NRW-Forschungs- und Entwicklungsarbeiten bereits heute anerkennenswert},
  series = {Energie : das Magazin f{\"u}r Wirtschaft, Forschung, Technik, Umwelt. Bd. 41 (1989), H. 12},
  journal   = {Energie : das Magazin f{\"u}r Wirtschaft, Forschung, Technik, Umwelt. Bd. 41 (1989), H. 12},
  issn      = {0013-7359},
  pages     = {32 -- 41},
  year      = {1989},
  language  = {de}
}
@article{KalbeHoeckerBerndt1989,
  author    = {Kalbe, Jochen and H{\"o}cker, Hartwig and Berndt, Heinz},
  title     = {Design of enzyme reactors as chromatographic columns for racemic resolution of amino acid esters},
  series = {Chromatographia},
  volume    = {28},
  journal   = {Chromatographia},
  number    = {3-4},
  isbn      = {0009-5893},
  doi       = {10.1007/BF02319646},
  pages     = {193 -- 196},
  year      = {1989},
  language  = {en}
}
@article{KuropkaMuellerHoeckeretal.1989,
  author    = {Kuropka, Rolf and M{\"u}ller, Bettina and H{\"o}cker, Hartwig and Berndt, Heinz},
  title     = {Chiral stationary phases via hydrosilylation reaction of N-acryloylamino acids : I. Stationary phase with one chiral centre for high-performance liquid chromatography and development of a new derivatization pattern for amino acid enantiomers},
  series = {Journal of chromatography A},
  journal   = {Journal of chromatography A},
  number    = {481},
  isbn      = {0021-9673},
  pages     = {380 -- 386},
  year      = {1989},
  language  = {en}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Steuerreformgesetz 1990},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Bd. 88},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {H. 1/2},
  issn      = {0013-5496},
  pages     = {78 -- 83},
  year      = {1989},
  language  = {de}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Steuerreformgesetz 1990},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Jg. 88},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {H. 2},
  issn      = {0947-0581 (E-Journal); 0340-7918 (Print)},
  pages     = {120 -- 121},
  year      = {1989},
  language  = {de}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Die Bedeutung des Effektivzinses in der Finanzwirtschaft},
  series = {Betriebs-Berater : BB : Beil. 14 Finanz-Berater},
  journal   = {Betriebs-Berater : BB : Beil. 14 Finanz-Berater},
  issn      = {0340-7926},
  pages     = {31 -- 32},
  year      = {1989},
  language  = {de}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Einfluß der Kontof{\"u}hrungsmodelle auf den Effektivzins und die Restschuld bei Annuit{\"a}tendarlehen},
  series = {Betriebs-Berater : BB : Beil. 14 Finanz-Berater},
  journal   = {Betriebs-Berater : BB : Beil. 14 Finanz-Berater},
  issn      = {0340-7926},
  pages     = {32 -- 37},
  year      = {1989},
  language  = {de}
}