@book{Wosnitza1980,
  author    = {Wosnitza, Franz},
  title     = {Freifeldmessungen an Violinen und geh{\"o}rgem{\"a}ße Bewertungen ihrer Frequenzen},
  year      = {1980},
  language  = {de}
}
@article{ZastrowRieder1980,
  author    = {Zastrow, Udo and Rieder, G.},
  title     = {Zur Eingrenzung der Eigenfrequenzen eines station{\"a}r schwingenden elastischen K{\"o}rpers mittels Integralgleichungen},
  series = {ZAMM - Zeitschrift f{\"u}r angewandte Mathematik und Mechanik. 60 (1980), H. 6},
  journal   = {ZAMM - Zeitschrift f{\"u}r angewandte Mathematik und Mechanik. 60 (1980), H. 6},
  isbn      = {1521-4001},
  pages     = {T149 -- T150},
  year      = {1980},
  language  = {de}
}
@article{ZastrowRieder1980,
  author    = {Zastrow, Udo and Rieder, G.},
  title     = {Bracketing eigenvalues of an oscillating elastic body by integral equations},
  series = {Bracketing of eigenfrequencies of continous structures : Euromech Colloquium, no. 112, M{\´a}traf{\"u}red (Hungary), 21 - 23 February, 1979 / ed. by {\`A}. Bosznay},
  journal   = {Bracketing of eigenfrequencies of continous structures : Euromech Colloquium, no. 112, M{\´a}traf{\"u}red (Hungary), 21 - 23 February, 1979 / ed. by {\`A}. Bosznay},
  publisher = {Akad. Kiad{\´o}},
  address   = {Budapest},
  isbn      = {963-05-2625-5},
  pages     = {421 -- 434},
  year      = {1980},
  language  = {en}
}
@article{Zastrow1980,
  author    = {Zastrow, Udo},
  title     = {Die Airysche Spannungsfunktion f{\"u}r die unendliche anisotrope, orthotrope und isotrope Scheibe},
  series = {ZAMM - Zeitschrift f{\"u}r Angewandte Mathematik und Mechanik. 60 (1980), H. 6},
  journal   = {ZAMM - Zeitschrift f{\"u}r Angewandte Mathematik und Mechanik. 60 (1980), H. 6},
  isbn      = {1521-4001},
  pages     = {T159 -- T160},
  year      = {1980},
  language  = {de}
}
@article{Alt1980,
  author    = {Alt, Helmut},
  title     = {Kurzschlußstromberechnung},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Jg. 79},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {H. 10},
  issn      = {0013-5496},
  pages     = {379 -- 382},
  year      = {1980},
  language  = {de}
}
@book{Alt1980,
  author    = {Alt, Helmut},
  title     = {Allgemeine Elektrotechnik, Nachrichtentechnik, Impulstechnik f{\"u}r UPN-Rechner. (Anwendung programmierbarer Taschenrechner ; 2)},
  publisher = {Vieweg},
  address   = {Braunschweig [u.a.]},
  isbn      = {3-528-04151-X},
  pages     = {VII, 109 S. : graph. Darst.},
  year      = {1980},
  language  = {de}
}
@book{Alt1980,
  author    = {Alt, Helmut},
  title     = {Elektrische Energietechnik, Steuerungstechnik, Elektrizit{\"a}tswirtschaft f{\"u}r UPN-Rechner. (Anwendung programmierbarer Taschenrechner ; 6)},
  publisher = {Vieweg},
  address   = {Braunschweig [u.a.]},
  isbn      = {3-528-04180-3},
  pages     = {VIII, 118 S. : graph. Darst.},
  year      = {1980},
  language  = {de}
}
@article{HagemannHennings1981,
  author    = {Hagemann, Hans-J{\"u}rgen and Hennings, D.},
  title     = {Reversible Weight change of acceptor-doped BaTiO3. Hagemann, H. J.; Hennings, D.},
  series = {Journal of the American Ceramic Society. 64 (1981)},
  journal   = {Journal of the American Ceramic Society. 64 (1981)},
  isbn      = {0002-7820},
  pages     = {590 -- 594},
  year      = {1981},
  language  = {en}
}
@article{Zastrow1981,
  author    = {Zastrow, Udo},
  title     = {Die Einflußfunktionen der Einzelkraft und der Stufenversetzung in der anisotropen Vollebene},
  series = {Archive of Applied Mechanics - Ingenieur Archiv. 51 (1981), H. 1-2},
  journal   = {Archive of Applied Mechanics - Ingenieur Archiv. 51 (1981), H. 1-2},
  isbn      = {1432-0681},
  pages     = {89 -- 99},
  year      = {1981},
  language  = {de}
}
@article{Alt1981,
  author    = {Alt, Helmut},
  title     = {Wirtschaftlichkeitsberechnung von Investitionen mit dem programmierbaren Taschenrechner},
  series = {3 R international : RRR ; Rohre, Rohrleitungsbau, Rohrleitungstransport},
  volume    = {Jg. 20},
  journal   = {3 R international : RRR ; Rohre, Rohrleitungsbau, Rohrleitungstransport},
  number    = {H. 10},
  issn      = {0340-3386},
  pages     = {561 -- 565},
  year      = {1981},
  language  = {de}
}
@book{SammFaissnerHenrigsetal.1982,
  author    = {Samm, Doris and Faissner, H. and Henrigs, W. and Preussger, A.},
  title     = {Further evidence for the radiative decay of a light, penetrating particle / Faissner, H. ; Heinrigs, W. ; Preussger, A. ; Samm, D.},
  publisher = {Technische Hochschule},
  address   = {Aachen},
  pages     = {16},
  year      = {1982},
  language  = {en}
}
@article{Zastrow1982,
  author    = {Zastrow, Udo},
  title     = {Solution of plane anisotropic elastostatical boundary value problems by singular integral equations},
  series = {Acta Mechanica. 44 (1982), H. 1-2},
  journal   = {Acta Mechanica. 44 (1982), H. 1-2},
  isbn      = {1619-6937},
  pages     = {59 -- 71},
  year      = {1982},
  language  = {en}
}
@article{Alt1982,
  author    = {Alt, Helmut},
  title     = {Statische oder dynamische Wirtschaftlichkeitsberechnung bei Investitionen zur Energieeinsparung},
  series = {Elektrow{\"a}rme international Edition B: Industrielle Elektrow{\"a}rme : IEW = Industrial applications of electro-heat : EWI ; Zeitschrift f{\"u}r das gesamte Gebiet der Elektrow{\"a}rme in Industrie, Gewerbe und Haushalt},
  volume    = {Jg. 40},
  journal   = {Elektrow{\"a}rme international Edition B: Industrielle Elektrow{\"a}rme : IEW = Industrial applications of electro-heat : EWI ; Zeitschrift f{\"u}r das gesamte Gebiet der Elektrow{\"a}rme in Industrie, Gewerbe und Haushalt},
  number    = {H. 3/4},
  issn      = {0340-3521},
  pages     = {166 -- 172},
  year      = {1982},
  language  = {de}
}
@book{AltSchumny1982,
  author    = {Alt, Helmut and Schumny, Harald},
  title     = {Programmierung mathematischer Algorithmen (Vieweg-Programmbibliothek Taschenrechner ; 1) / Helmut Alt ; Harald Schumny [Hrsg.]},
  publisher = {Vieweg + Teubner},
  address   = {Wiesbaden},
  isbn      = {3-528-04211-7},
  pages     = {92 S.},
  year      = {1982},
  language  = {de}
}
@article{SammFaissnerHeinrigsetal.1983,
  author    = {Samm, Doris and Faissner, H. and Heinrigs, W. and Latsch, C.},
  title     = {Richtungsselektive Z{\"a}hleranordnung zur Messung der Masse Axion-{\"a}hnlicher Teilchen / Faissner, H. ; Heinrigs, W. ; Latsch, C.; Preussger, A.; Samm, D.},
  series = {Verhandlungen der Deutschen Physikalischen Gesellschaft. 18 (1983), H. 6},
  journal   = {Verhandlungen der Deutschen Physikalischen Gesellschaft. 18 (1983), H. 6},
  pages     = {1213 -- 1213},
  year      = {1983},
  language  = {de}
}
@article{Alt1983,
  author    = {Alt, Helmut},
  title     = {Einsatz programmierbarer Rechner im Sondervertragskundenbereich der Gasversorgung},
  series = {Das Gas- und Wasserfach : Ausgabe Gas, Erdgas : GWF},
  volume    = {Bd. 124},
  journal   = {Das Gas- und Wasserfach : Ausgabe Gas, Erdgas : GWF},
  number    = {H. 9},
  issn      = {0016-4909},
  pages     = {468 -- 471},
  year      = {1983},
  language  = {de}
}
@incollection{Alt1983,
  author    = {Alt, Helmut},
  title     = {Analog anzeigende Digitaluhr},
  series = {FH-Texte ; 36 : Berichte aus dem Fachbereich Elektrotechnik Aachen},
  booktitle = {FH-Texte ; 36 : Berichte aus dem Fachbereich Elektrotechnik Aachen},
  publisher = {Fachhochschule Aachen},
  address   = {Aachen},
  pages     = {98 -- 104},
  year      = {1983},
  language  = {de}
}
@article{Alt1983,
  author    = {Alt, Helmut},
  title     = {Auswertung von Belastungskennlinien},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Bd. 82},
  journal   = {Elektrizit{\"a}tswirtschaft},
  issn      = {0013-5496},
  pages     = {208 -- 210},
  year      = {1983},
  language  = {de}
}
@book{AltSchumny1983,
  author    = {Alt, Helmut and Schumny, Harald},
  title     = {Schreiben, Zeichnen, Tabellieren : (TI-59, HP-41 C) (Vieweg-Programmbibliothek Taschenrechner ; 4) / Helmut Alt ; Harald Schumny [Hrsg.]},
  publisher = {Vieweg + Teubner},
  address   = {Wiesbaden},
  isbn      = {3-528-04233-8},
  pages     = {77 S.},
  year      = {1983},
  language  = {de}
}
@book{AltSchumny1983,
  author    = {Alt, Helmut and Schumny, Harald},
  title     = {Taschenrechnerarithmetik mit erh{\"o}hter Genauigkeit (TI-59/HP-41C) (Vieweg-Programmbibliothek Taschenrechner ; 2) / Helmut Alt ; Harald Schumny [Hrsg.]},
  publisher = {Vieweg + Teubner},
  address   = {Wiesbaden},
  isbn      = {3-528-04229-X ; 978-3-322-91099-8 ; 978-3-528-04229-5},
  pages     = {III, 58 S.},
  year      = {1983},
  language  = {de}
}