Audun Jøsang, Stephen Marsh, Simon Pope. Exploring Different Types of Trust Propagation. In Ketil Stølen, William H. Winsborough, Fabio Martinelli, Fabio Massacci, editors, Trust Management, 4th International Conference, iTrust 2006, Pisa, Italy, May 16-19, 2006, Proceedings. Volume 3986 of Lecture Notes in Computer Science, pages 179-192, Springer, 2006. [doi]