@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}
}
@article{GerhardtKonrathLieb2002,
  author    = {Gerhardt, Hans Joachim and Konrath, Bernd and Lieb, Rolf-Dieter},
  title     = {Zur Druckbel{\"u}ftung von Sicherheitstreppenr{\"a}umen},
  series = {vfdb-Zeitschrift. 51 (2002), H. 3},
  journal   = {vfdb-Zeitschrift. 51 (2002), H. 3},
  isbn      = {0042-1804},
  pages     = {122 -- 128},
  year      = {2002},
  language  = {de}
}