@misc{Werner2010,
  author    = {Wolfgang Werner},
  title     = {www.impurismus.de [Homepage von Wolfgang Werner]},
  number    = {1. Fassung: 03.04.2009 ; 2. Fassung: 04.01.2010},
  url       = {http://www.impurismus.de/index.html},
  institution = {Extern},
  type      = {other},
  pages     = {197},
  year        = {2010},
}