C. Trattner, P. Singer, D. Helic, и M. Strohmaier. Proceedings of the 12th International Conference on Knowledge Management and Knowledge Technologies, стр. 14:1--14:8. New York, NY, USA, ACM, (2012)
J. Hidders, M. Dumas, W. van der Aalst, A. ter Hofstede, и J. Verelst. Proceedings of the 2005 Australasian Symposium on Theory of Computing - Volume 41, стр. 3--11. Darlinghurst, Australia, Australia, Australian Computer Society, Inc., (2005)