@article{AletseeBaumann1991,
  author    = {Aletsee, Ludwig and Baumann, Marcus},
  title     = {A laboratory incubator equipped with facilities to automatically simulate natural irradiance},
  series = {Boletim do Instituto Oceanogr{\´a}fico / Universidade de S{\~a}o Paulo},
  volume    = {Vol. 39},
  journal   = {Boletim do Instituto Oceanogr{\´a}fico / Universidade de S{\~a}o Paulo},
  number    = {No. 2},
  issn      = {1982-436X; 0080-6331},
  pages     = {155 -- 159},
  year      = {1991},
  language  = {en}
}
@article{Grotendorst1991,
  author    = {Grotendorst, Johannes},
  title     = {A Maple package for transforming series, sequences and functions},
  series = {Computer Physics Communications. 67 (1991), H. 2},
  journal   = {Computer Physics Communications. 67 (1991), H. 2},
  isbn      = {0010-4655},
  pages     = {325 -- 342},
  year      = {1991},
  language  = {en}
}
@article{FassbenderVogler1991,
  author    = {Faßbender, Heinz and Vogler, Heiko},
  title     = {A narrowing machine for the functional logic language BABEL, restricted to primitive recursion : abstract},
  series = {Granada Workshop on the Integration of Functional and Logic Programming / Granada Workshop on the Integration of Functional and Logic Programming <1990>. K. Indermark ... (ed.)},
  journal   = {Granada Workshop on the Integration of Functional and Logic Programming / Granada Workshop on the Integration of Functional and Logic Programming <1990>. K. Indermark ... (ed.)},
  publisher = {RWTH, Fachgruppe Informatik},
  address   = {Aachen},
  pages     = {95 -- 96},
  year      = {1991},
  language  = {en}
}
@article{Weigand1991,
  author    = {Weigand, Christoph},
  title     = {A Solution to the Scheduling Problem Taking into Account Quality},
  series = {Operations research '91 : extended abstracts of the 16th Symposium on Operations Research held at the University of Trier at September 9 - 11, 1991 / [GM{\"O}OR]. Peter Gritzmann ... (eds.)},
  journal   = {Operations research '91 : extended abstracts of the 16th Symposium on Operations Research held at the University of Trier at September 9 - 11, 1991 / [GM{\"O}OR]. Peter Gritzmann ... (eds.)},
  publisher = {Physica-Verl.},
  address   = {Heidelberg},
  isbn      = {3790806080},
  pages     = {373 -- 375},
  year      = {1991},
  language  = {en}
}
@article{GoettscheReillyWittwer1991,
  author    = {G{\"o}ttsche, Joachim and Reilly, S. and Wittwer, Volker},
  title     = {Advanced window systems and building energy performance / S. Reilly ; J. G{\"o}ttsche ; V. Wittwer},
  series = {Solar World Congress, 1991 : proceedings of the biennial congress of the International Solar Energy Society, Denver, Colorado, USA, 19-23 August 1991 / ed. by M. E. Arden ...},
  journal   = {Solar World Congress, 1991 : proceedings of the biennial congress of the International Solar Energy Society, Denver, Colorado, USA, 19-23 August 1991 / ed. by M. E. Arden ...},
  publisher = {Pergamon Press},
  address   = {Oxford [u.a.]},
  isbn      = {0-08-041690-X},
  pages     = {3211 -- 3216},
  year      = {1991},
  language  = {en}
}
@article{KernHasseWiesingeretal.1991,
  author    = {Kern, Alexander and Hasse, P. and Wiesinger, J. and Zischank, Wolfgang J.},
  title     = {Aktuelles aus der Blitzforschung},
  series = {ETZ : Elektrotechnik + Automation. 112 (1991), H. 1},
  journal   = {ETZ : Elektrotechnik + Automation. 112 (1991), H. 1},
  isbn      = {0170-1711},
  year      = {1991},
  language  = {de}
}
@article{JerominScheidt1991,
  author    = {Jeromin, G{\"u}nter Erich and Scheidt, Annette},
  title     = {Aliphatic optically active alcohols by enzyme-aided synthesis},
  series = {Tetrahedron Letters . 32 (1991), H. 48},
  journal   = {Tetrahedron Letters . 32 (1991), H. 48},
  isbn      = {0040-4039},
  pages     = {7021 -- 7024},
  year      = {1991},
  language  = {en}
}
@article{BienerSasse1991,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Altlasten-Bewertung bei Investitionsentscheidungen},
  series = {Bremer Unternehmer (1991)},
  journal   = {Bremer Unternehmer (1991)},
  pages     = {S. 27},
  year      = {1991},
  language  = {de}
}
@article{GruetersSavvidisLoeeretal.1991,
  author    = {Gr{\"u}ters, Hugo and Savvidis, E. and L{\"o}er, F. and Wiesener, C. H.},
  title     = {Analyse der Beanspruchung des proximalen Femur bei verschiedenen Arten der Belastung mit Hilfe der Finite-Element-Methode / Savvidis, E. ; L{\"o}er, F. ; Gr{\"u}ters, Hugo ; Wiesener, C. H.},
  series = {Zeitschrift f{\"u}r Orthop{\"a}die und ihre Grenzgebiete. 129 (1991), H. 3},
  journal   = {Zeitschrift f{\"u}r Orthop{\"a}die und ihre Grenzgebiete. 129 (1991), H. 3},
  isbn      = {1615-9586},
  pages     = {268 -- 277},
  year      = {1991},
  language  = {de}
}
@article{Mayer1991,
  author    = {Mayer, Claudia},
  title     = {Aspekte der Wiedervereinigung in der aktuellen deutschen Literatur.},
  series = {Forum Deutsch : Informationen, Meinungen, Materialien und Tips f{\"u}r kanadische Deutschlehrer / St{\"a}ndige Konferenz kanadischer Deutschlehrer (1991)},
  journal   = {Forum Deutsch : Informationen, Meinungen, Materialien und Tips f{\"u}r kanadische Deutschlehrer / St{\"a}ndige Konferenz kanadischer Deutschlehrer (1991)},
  pages     = {16 -- 22},
  year      = {1991},
  language  = {de}
}