J. Novak, M. Wurst, M. Fleischmann, and W. Strauss. AMKM2003, volume LNAI2926 of Lecture notes in Artificial Intelligence, page 213-228. Springer-Verlag Berlin Heidelberg, (2003)work.
E. Davenport, and L. McLaughlin. chapter Interpersonal Trust in Online Partnerships: The Challenge of Representation, page 107-123. Idea Group, (2004)ISBN:1-59140-220-4.