R. Maier, and A. Schmidt. 4th Conference Professional Knowledge Management - Experiences and Visions (WM '07), Potsdam, 1, page 325-334. Berlin, GITO, (2007)
J. Vanhoenacker, A. Bryant, and G. Dedene. SIGCPR '99: Proceedings of the 1999 ACM SIGCPR conference on Computer
personnel research, page 231--241. New York, NY, USA, ACM Press, (1999)
L. Efimova. Proceedings of The Fifth European Conference on Organisational Knowledge,
Learning and Capabilities (OKLC 2004), April 2-3, 2004, (April 2004)