@book{Laack2007,
  author    = {Laack, Walter van},
  title     = {To perceive the world with logic},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-936624-08-3},
  pages     = {340 S. : Ill., graph. Darst},
  year      = {2007},
  language  = {en}
}
@book{Kraft2007,
  author    = {Kraft, Bodo},
  title     = {Semantische Unterst{\"u}tzung des konzeptuellen Geb{\"a}udeentwurfs},
  publisher = {Shaker},
  address   = {Aachen},
  isbn      = {978-3-8322-6045-3},
  pages     = {VIII, 381 S. : Ill., graph. Darst.},
  year      = {2007},
  language  = {de}
}
@book{Schelthoff2007,
  author    = {Schelthoff, Christof},
  title     = {Mathematik im Bachelorstudium f{\"u}r Studierende der Biotechnologie, der Prozesstechnik und der angewandten Chemie. 2. {\"u}berarb. Aufl.},
  publisher = {Shaker},
  address   = {Aachen},
  isbn      = {978-3-8322-6507-6},
  pages     = {478 S.},
  year      = {2007},
  language  = {de}
}