@misc{WetterBrueggingOrtmann2013,
  author    = {Christof Wetter and Elmar Br{\"u}gging and Jan Ortmann},
  title     = {Groen Gas InNet; 1. Expertenworkshop InNet, Steinfurt April 2013},
  institution = {Energie · Geb{\"a}ude · Umwelt (EGU)},
  type      = {lecture},
  year        = {2013},
}