@incollection{GeigerOrthSchultzetal.2000,
  author    = {Geiger, W. F. and Orth, H. and Schultz, G. A. and Frehmann, T. and Gr{\"u}ning, H. and Niemann, K. and Quirmbach, M.},
  title     = {Abschlussbericht zum Forschungsprojekt "Gemeinsame Bewirtschaftung (Steuerung) von Kanalnetz und Kl{\"a}rwerk zur Minimierung von {\"U}berlastungen und Schadwirkungen im Gew{\"a}sser". DFG, Bochum und Essen (September 2000)},
  year      = {2000},
  language  = {de}
}
@incollection{SteinOrthCremeretal.1998,
  author    = {Stein, D. and Orth, H. and Cremer, S. and Falk, C. and Gr{\"u}ning, H.},
  title     = {Abschlussbericht zur "Erweiterung der Pilotstudie zur {\"U}berpr{\"u}fung von Durchflussmesseinrichtungen auf Kl{\"a}ranlagen in NRW", im Auftrag des Ministeriums f{\"u}r Umwelt, Raumordnung und Landwirtschaft des Landes NRW},
  year      = {1998},
  language  = {de}
}
@incollection{GrueningOrth2001,
  author    = {Gr{\"u}ning, H. and Orth, H.},
  title     = {Investigations on the dynamics of the compositions of combined wastewater using on-line analyzers},
  series = {1st IWA conference on Instrumentation, Control and Automation, Malm{\"o}, Sweden, 03.-07. June 2001},
  booktitle = {1st IWA conference on Instrumentation, Control and Automation, Malm{\"o}, Sweden, 03.-07. June 2001},
  pages     = {139 -- 146},
  year      = {2001},
  language  = {en}
}
@incollection{GrueningOrth2001,
  author    = {Gr{\"u}ning, H. and Orth, H.},
  title     = {Control strategies for optimisation of urban wastewater system based on precipitation forecast},
  series = {NOVATECH 2001, 4th International Conference on Innovative Technologies in Urban Drainage, Lyon-Villeurebanne, France, 25.-27. June 2001},
  booktitle = {NOVATECH 2001, 4th International Conference on Innovative Technologies in Urban Drainage, Lyon-Villeurebanne, France, 25.-27. June 2001},
  pages     = {477 -- 484},
  year      = {2001},
  language  = {en}
}
@incollection{GrueningOrth2000,
  author    = {Gr{\"u}ning, H. and Orth, H.},
  title     = {Steuerung von Kanalnetz und Kl{\"a}ranlage auf der Basis von Niederschlagsvorhersagen aus Radarmessungen, 18. Bochumer Workshop "Innovationen in der Abwasserbeseitigung"},
  series = {Schriftenreihe Siedlungswasserwirtschaft der Ruhr-Universit{\"a}t Bochum},
  volume    = {37},
  booktitle = {Schriftenreihe Siedlungswasserwirtschaft der Ruhr-Universit{\"a}t Bochum},
  pages     = {5 -- 28},
  year      = {2000},
  language  = {de}
}
@incollection{GrueningOrth1999,
  author    = {Gr{\"u}ning, H. and Orth, H.},
  title     = {Disintegration of digested sludge and its influence on the residual gas production capacity},
  pages     = {S. 233 -- 244},
  year      = {1999},
  language  = {en}
}