@article{GerhardtCooperWhitbreadetal.1985,
  author    = {Gerhardt, Hans Joachim and Cooper, K.-R. and Whitbread, R. and Gary, K.-P. (u.a.)},
  title     = {A comparison of aerodynamic drag measurements on model trucks in closed-jet and open-jet wind tunnels},
  pages     = {261 -- 274},
  year      = {1985},
  language  = {en}
}
@article{GerhardtBofahKramer1990,
  author    = {Gerhardt, Hans Joachim and Bofah, K.-K. and Kramer, C.},
  title     = {Lagesicherheit lose verlegter W{\"a}rmed{\"a}mmplatten auf Flachd{\"a}chern},
  series = {Die Bautechnik. 67 (1990), H. 2},
  journal   = {Die Bautechnik. 67 (1990), H. 2},
  isbn      = {0005-6820},
  pages     = {55 -- 60},
  year      = {1990},
  language  = {de}
}
@article{Gerhardt2003,
  author    = {Gerhardt, Hans Joachim},
  title     = {Rauchableitung und deren Effektivit{\"a}t in der 4. Elbtunnelr{\"o}hre},
  series = {tunnel - Internationale Fachzeitschrift f{\"u}r unterirdisches Bauen (2003)},
  journal   = {tunnel - Internationale Fachzeitschrift f{\"u}r unterirdisches Bauen (2003)},
  isbn      = {0722-6241},
  pages     = {19 -- 28},
  year      = {2003},
  language  = {de}
}
@book{Gerhardt2005,
  author    = {Gerhardt, Hans Joachim},
  title     = {Windsch{\"a}den : mit 6 Tabellen. - (Schadenfreies Bauen ; 37)},
  publisher = {Fraunhofer-IRB-Verl.},
  address   = {Stuttgart},
  isbn      = {3-8167-6670-6},
  pages     = {129 S. : zahlr. Ill., graph. Darst.},
  year      = {2005},
  language  = {de}
}
@book{GerhardtKramerJansen1977,
  author    = {Gerhardt, Hans Joachim and Kramer, Carl and Jansen, Hubert},
  title     = {Traglufthallen unter Windbelastung},
  publisher = {Westdt. Verl.},
  address   = {Opladen},
  isbn      = {3-531-02650-X},
  pages     = {39 S. : Ill., graph. Darst.},
  year      = {1977},
  language  = {de}
}
@book{Gerhardt1994,
  author    = {Gerhardt, Hans Joachim},
  title     = {Absaugung von großfl{\"a}chig austretenden Schadstoffen beim offenen Guttransport},
  address   = {Frankfurt/M},
  year      = {1994},
  language  = {de}
}
@article{Gerhardt1994,
  author    = {Gerhardt, Hans Joachim},
  title     = {Lufttechnische Pr{\"u}fungen von Abz{\"u}gen - Kritische Anmerkungen zur Pr{\"u}fvorschrift DIN 12 924 Teil 1},
  series = {GIT Spezial: Arbeitschutz (1994)},
  journal   = {GIT Spezial: Arbeitschutz (1994)},
  isbn      = {0940-032X},
  pages     = {90 -- 95},
  year      = {1994},
  language  = {de}
}
@article{Gerhardt1994,
  author    = {Gerhardt, Hans Joachim},
  title     = {L{\"o}sungskonzept zur Bel{\"u}ftung von Rottehallen},
  series = {Abfallwirtschaftsjournal. 6 (1994), H. 10},
  journal   = {Abfallwirtschaftsjournal. 6 (1994), H. 10},
  isbn      = {0934-6422},
  pages     = {689 -- 692},
  year      = {1994},
  language  = {de}
}
@article{Gerhardt1995,
  author    = {Gerhardt, Hans Joachim},
  title     = {Arbeitsschutz in Altstoffsortieranlagen - Raumlufttechnische Maßnahmen},
  series = {Abfallwirtschaftsjournal. 7 (1995), H. 7/8},
  journal   = {Abfallwirtschaftsjournal. 7 (1995), H. 7/8},
  isbn      = {0934-6422},
  pages     = {471 -- 473},
  year      = {1995},
  language  = {de}
}
@article{Siedenbiedel1999,
  author    = {Siedenbiedel, Georg},
  title     = {Unternehmenspr{\"a}senz am Auslandsmarkt},
  series = {Business-to-Business-Marketing : Handbuch f{\"u}r Vertrieb, Technik, Service / Werner Pepels (Hrsg.)},
  journal   = {Business-to-Business-Marketing : Handbuch f{\"u}r Vertrieb, Technik, Service / Werner Pepels (Hrsg.)},
  publisher = {Luchterhand},
  address   = {Neuwied [u.a.]},
  pages     = {630 -- 646},
  year      = {1999},
  language  = {de}
}
@book{Siedenbiedel2001,
  author    = {Siedenbiedel, Georg},
  title     = {Organisationslehre},
  publisher = {Kohlhammer},
  address   = {Stuttgart [u.a.]},
  isbn      = {3-17-016498-8},
  pages     = {XVI, 239 S. : graph. Darst.},
  year      = {2001},
  language  = {de}
}
@book{SiedenbiedelEislerMertz2000,
  author    = {Siedenbiedel, Georg and Eisler-Mertz, Christiane},
  title     = {Schl{\"u}sselqualifikationen im Marketing},
  publisher = {Fortis [u.a.]},
  address   = {K{\"o}ln [u.a.]},
  pages     = {281 S. : Ill., graph. Darst.},
  year      = {2000},
  language  = {de}
}
@article{Siedenbiedel2000,
  author    = {Siedenbiedel, Georg},
  title     = {Der Auslandsabsatz als Gegenstand strategischer Entscheidungen},
  series = {Marketing-Management f{\"u}r Ingenieure und Informatiker /Pepels. Werner (Hrsg.)},
  journal   = {Marketing-Management f{\"u}r Ingenieure und Informatiker /Pepels. Werner (Hrsg.)},
  publisher = {Fortis [u.a.]},
  address   = {K{\"o}ln [u.a.]},
  pages     = {207 -- 234},
  year      = {2000},
  language  = {de}
}
@book{Tietze1992,
  author    = {Tietze, J{\"u}rgen},
  title     = {Monotonie und Kr{\"u}mmung : Wechselbeziehungen bei Gesamtkosten- und St{\"u}ckkostenfunktionen},
  publisher = {Alano-Verl.},
  address   = {Aachen},
  isbn      = {3-89399-169-7},
  pages     = {VI, 51 S. : zahlr. graph. Darst.},
  year      = {1992},
  language  = {de}
}
@book{Tietze1992,
  author    = {Tietze, J{\"u}rgen},
  title     = {{\"O}konomische Interpretation optimaler Simplex-Tableaus},
  publisher = {Alano-Verl.},
  address   = {Aachen},
  isbn      = {3-89399-170-0},
  pages     = {VI, 33 S.},
  year      = {1992},
  language  = {de}
}
@book{Tietze2005,
  author    = {Tietze, J{\"u}rgen},
  title     = {Einf{\"u}hrung in die angewandte Wirtschaftsmathematik. 12., vollst. {\"u}berarb. Aufl.},
  publisher = {Vieweg},
  address   = {Wiesbaden},
  isbn      = {3-528-11164-X},
  pages     = {XVI, 566 S. : 500 Abb. u. 1300 {\"U}bungsaufg.},
  year      = {2005},
  language  = {de}
}
@book{Tietze2005,
  author    = {Tietze, J{\"u}rgen},
  title     = {{\"U}bungsbuch zur angewandten Wirtschaftsmathematik : Aufgaben, Testklausuren und L{\"o}sungen . 5., erw. Aufl.},
  publisher = {Vieweg},
  address   = {Wiesbaden},
  isbn      = {3-528-43146-6},
  pages     = {VIII, 326 S. : graph. Darst.},
  year      = {2005},
  language  = {de}
}
@book{Tietze2004,
  author    = {Tietze, J{\"u}rgen},
  title     = {Einf{\"u}hrung in die Finanzmathematik : klassische Verfahren und neuere Entwicklungen: Effektivzins- und Renditeberechnung, Investitionsrechnung, derivative Finanzinstrumente ; mit {\"u}ber 500 {\"U}bungsaufgaben. 7., verb. Aufl.},
  publisher = {Vieweg},
  address   = {Wiesbaden},
  isbn      = {3-528-66552-1},
  pages     = {XII, 431 S. : graph. Darst.},
  year      = {2004},
  language  = {de}
}
@book{Tietze2004,
  author    = {Tietze, J{\"u}rgen},
  title     = {{\"U}bungsbuch zur Finanzmathematik : Aufgaben, Testklausuren und L{\"o}sungen. 3., verb. Aufl.},
  publisher = {Vieweg},
  address   = {Wiesbaden},
  isbn      = {3-528-23145-9},
  pages     = {XII, 372 S. : graph. Darst.},
  year      = {2004},
  language  = {de}
}
@article{GerhardtSchmidtJung2002,
  author    = {Gerhardt, Hans Joachim and Schmidt, G. and Jung, G.},
  title     = {Rauchversuch in einem Hochregallager},
  series = {Bautechnik. 79 (2002), H. 6},
  journal   = {Bautechnik. 79 (2002), H. 6},
  isbn      = {0932-8351},
  pages     = {414 -- 417},
  year      = {2002},
  language  = {de}
}