@book{OPUS4-22657,
  title     = {New forms of collaborative innovation and production on the internet : an interdisciplinary perspective},
  editor    = {Volker Wittke and Heidemarie Hanekop},
  isbn      = {978-3-86395-020-0},
  url       = {http://webdoc.sub.gwdg.de/univerlag/2011/wittke_hanekop.pdf},
  year      = {2011},
}