@incollection{Helmig2011,
  author    = {Helmig, Ilka},
  title     = {Friendship : editorial illustration},
  series = {Papercraft 2 : design and art with paper},
  booktitle = {Papercraft 2 : design and art with paper},
  publisher = {Gestalten Verlag},
  address   = {Berlin},
  isbn      = {978-3-89955-333-8},
  pages     = {237},
  year      = {2011},
  subject      = {Papierkunst},
  language  = {en}
}