@incollection{Helmig2009,
  author    = {Helmig, Ilka},
  title     = {Tristan und Isolde, Samson und Dalila, Capriccio : 3D illustration for posters of Cologne Opera},
  series = {Papercraft [1] : design and art with paper},
  booktitle = {Papercraft [1] : design and art with paper},
  editor    = {Klanten, Robert},
  publisher = {Gestalten Verlag},
  address   = {Berlin},
  isbn      = {978-3-89955-251-5},
  pages     = {202},
  year      = {2009},
  subject      = {Papierkunst},
  language  = {en}
}
@incollection{BoonzaaijerHelmig2009,
  author    = {Boonzaaijer, Karel and Helmig, Ilka},
  title     = {2D Room : cardboard installation},
  series = {Papercraft [1] : design and art with paper},
  booktitle = {Papercraft [1] : design and art with paper},
  publisher = {Gestalten Verlag},
  address   = {Berlin},
  isbn      = {978-3-89955-251-5},
  pages     = {206},
  year      = {2009},
  subject      = {Papierkunst},
  language  = {en}
}
@incollection{HelmigBoonzaaijer2009,
  author    = {Helmig, Ilka and Boonzaaijer, Karel},
  title     = {Growing 48 hours : design experiment in an aircraft hangar ...},
  series = {Papercraft [1] : design and art with paper},
  booktitle = {Papercraft [1] : design and art with paper},
  publisher = {Gestalten Verlag},
  address   = {Berlin},
  isbn      = {978-3-89955-251-5},
  pages     = {224},
  year      = {2009},
  subject      = {Papierkunst},
  language  = {en}
}
@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}
}