@article{MuellerFischer2007,
  author    = {M{\"u}ller, Karsten and Fischer, B.},
  title     = {Zustandserfassung von Kanalisationen},
  series = {Gas, Wasser, Abwasser (gwa). Bd. 87 (2007), H. 4},
  journal   = {Gas, Wasser, Abwasser (gwa). Bd. 87 (2007), H. 4},
  issn      = {0036-8008},
  pages     = {249 -- 254},
  year      = {2007},
  language  = {de}
}
@inproceedings{MuellerFischer2009,
  author    = {M{\"u}ller, Karsten and Fischer, B.},
  title     = {Objective condition assessment of sewer systems},
  series = {Strategic asset management of water supply and wastewater infrastructures : invited papers from the 2nd IWA Leading Edge Conference on Strategic Asset Management (LESAM), Lisbon, October [17 - 19] 2007 / ed. by Helene Alegre and Maria do C{\´e}u Almeida},
  booktitle = {Strategic asset management of water supply and wastewater infrastructures : invited papers from the 2nd IWA Leading Edge Conference on Strategic Asset Management (LESAM), Lisbon, October [17 - 19] 2007 / ed. by Helene Alegre and Maria do C{\´e}u Almeida},
  publisher = {IWA Publ.},
  address   = {London},
  isbn      = {9781843391869},
  pages     = {521 -- 534},
  year      = {2009},
  language  = {en}
}