@inproceedings{MuellerFischer2013,
  author    = {Karsten M{\"u}ller and B. Fischer},
  title     = {Objective condition assessment of sewer systems},
  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},
  pages     = {521 -- 534},
  year      = {2013},
}