@book{Gebhardt2011,
  author    = {Gebhardt, Andreas},
  title     = {Understanding Additive Manufacturing : Rapid Prototyping - Rapid Tooling - Rapid Manufacturing},
  publisher = {Hanser},
  address   = {M{\"u}nchen},
  isbn      = {978-3-446-42552-1},
  pages     = {VIII, 164 S. : farb. Ill.},
  year      = {2011},
  language  = {en}
}
@book{Artmann2011,
  author    = {Artmann, Gerhard},
  title     = {Stem cell engineering : principles and applications / Gerhard M. Artmann ... eds.},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {978-3-642-11864-7},
  pages     = {XLI, 541 S. : Ill., graph. Darst.},
  year      = {2011},
  language  = {en}
}