@article{PietschKurbel2005,
  author    = {Wolfram Pietsch and Karl Kurbel},
  title     = {Expertensystem-Projekte. Entwicklungsmethodik, Organisation und Management / Kurbel, K., Pietsch, W.},
  journal   = {Informatik-Spektrum. 12 (1989), H. 2},
  pages     = {133 -- 146},
  year      = {2005},
}