@book{Winkler2002,
  author    = {Winkler, Norbert},
  title     = {Zahlentafeln f{\"u}r den Baubetrieb / Hoffmann, Manfred [Hrsg.]. 6., vollst. aktualisierte Aufl. ... Norbert Winkler [Bearb.]},
  publisher = {Teubner},
  address   = {Stuttgart [u.a.]},
  isbn      = {3-519-55220-5},
  pages     = {VII, 889 S. : Ill., graph. Darst.},
  year      = {2002},
  language  = {de}
}
@book{ThielemannBachem2002,
  author    = {Thielemann, Frank and Bachem, Claus},
  title     = {{\"U}berlegungen zur Evaluation von Technologief{\"o}rderprogrammen},
  publisher = {nst. f{\"u}r Wirtschaftswiss.},
  address   = {Braunschweig},
  isbn      = {3-933628-42-3},
  pages     = {48 S : graph. Darst.},
  year      = {2002},
  language  = {de}
}