@misc{GrueningHoppe2008,
  author    = {Gr{\"u}ning, H. and Hoppe, H.},
  title     = {Dezentrale Behandlungsanlagen im Vergleich zu Regenkl{\"a}rbecken. Vortrag im Rahmen des 4. Erfahrungsaustausches "Regenbecken und Gew{\"a}sser des DWA-Landesverbandes NRW, am 13. November 2008 in Hagen},
  year      = {2008},
  language  = {de}
}
@misc{HoppeMessmannGigaetal.2008,
  author    = {Hoppe, H. and Messmann, S. and Giga, A. and Gr{\"u}ning, H.},
  title     = {Options and limits of quantitative and qualitative online-monitoring of industrial discharges into municipal sewage systems. 11th International Conference on Urban Drainage, Edinburgh, Scotland, UK 2008},
  year      = {2008},
  language  = {en}
}
@misc{GrueningHoppe2008,
  author    = {Gr{\"u}ning, H. and Hoppe, H.},
  title     = {Spectrophotometric applications in wastewater and storm water sewers. 11th International Conference on Urban Drainage, Edinburgh, Scotland, UK 2008},
  year      = {2008},
  language  = {en}
}
@misc{GrueningHoppeGigaetal.2008,
  author    = {Gr{\"u}ning, H. and Hoppe, H. and Giga, A. and Meßmann, S.},
  title     = {Drosselpr{\"u}fung - Sinn oder Unsinn? Vortrag im Rahmen des 3. Erfahrungsaustausches "Regenbecken und Gew{\"a}sser des DWA-Landesverbandes NRW, am 16. Januar 2008 in Essen},
  year      = {2008},
  language  = {de}
}