M. Eppler, P. Seifried, and A. R�pnack. SIGCPR '99: Proceedings of the 1999 ACM SIGCPR conference on Computer
personnel research, page 222--230. New York, NY, USA, ACM Press, (1999)
N. Gronau, C. Müller, and R. Korf. Journal of Universal Computer Science, 11 (4):
452--472(2005)\url|http://www.jucs.org/jucs_11_4/kmdl_capturing_analysing_and|.