@article{UhlGrotehusmannKheliletal.1991,
  author    = {Uhl, M. and Grotehusmann, D. and Khelil, A. and Sieker, F.},
  title     = {Regenwasserversickerung am Beispiel Gelsenkirchen-Sch{\"u}ngelbergsiedlung},
  series = {Zeitschrift f{\"u}r Stadtentw{\"a}sserung und Gew{\"a}sserschutz (SuG)},
  journal   = {Zeitschrift f{\"u}r Stadtentw{\"a}sserung und Gew{\"a}sserschutz (SuG)},
  number    = {4},
  pages     = {207 -- 240},
  year      = {1991},
  language  = {mul}
}
@book{GrotehusmannKhelilSiekeretal.1992,
  author    = {Grotehusmann, D. and Khelil, A. and Sieker, F. and Uhl, M. and Pesch, F. and Brosk, R. and Nowak, F.- J.},
  title     = {Regenwasserentsorgung im Wohngebiet - Studie zur {\"o}kologisch orientierten Regenwasserentsorgung versiegelter Fl{\"a}chen im Einzugsgebiet der Emscher},
  volume    = {6},
  year      = {1992},
  language  = {de}
}
@article{GrotehusmannKhelilSiekeretal.1992,
  author    = {Grotehusmann, D. and Khelil, A. and Sieker, F. and Uhl, M.},
  title     = {Naturnahe Regenwasserentsorgung durch Mulden-Rigolen-Systeme},
  series = {Korrespondenz Abwasser},
  volume    = {39},
  journal   = {Korrespondenz Abwasser},
  number    = {5},
  pages     = {666 -- 687},
  year      = {1992},
  language  = {de}
}
@article{SiekerUhl1986,
  author    = {Sieker, F. and Uhl, M.},
  title     = {Hydrologische Grundlagen zur Bemessung von Mischwasserentlastungen},
  series = {Korrespondenz Abwasser},
  volume    = {35},
  journal   = {Korrespondenz Abwasser},
  number    = {12},
  pages     = {1254 -- 1255},
  year      = {1986},
  language  = {de}
}
@article{GrotehusmannKhelilSiekeretal.1994,
  author    = {Grotehusmann, D. and Khelil, A. and Sieker, F. and Uhl, M.},
  title     = {Alternative urban drainage concept and design},
  series = {Water Science and Technology},
  volume    = {29},
  journal   = {Water Science and Technology},
  number    = {1-2},
  pages     = {277 -- 282},
  year      = {1994},
  language  = {en}
}
@incollection{GrotehusmannKhelilSiekeretal.1993,
  author    = {Grotehusmann, D. and Khelil, A. and Sieker, F. and Uhl, M.},
  title     = {Alternative urban drainage concept and design},
  series = {Proceedings of the 6th International Conference on Urban Storm Drainage, Niagara Falls, Canada},
  booktitle = {Proceedings of the 6th International Conference on Urban Storm Drainage, Niagara Falls, Canada},
  pages     = {1213 -- 1218},
  year      = {1993},
  language  = {en}
}