1. Gambetta, D.: Can We Trust Trust? In: Gambetta, D. (ed.) Trust: Making and Breaking Cooperative Relations, electronic edn., Department of Sociology, pp. 213–237. University of Oxford (1998), http://www.sociology.ox.ac.uk/papers/gambetta213-237.pdf
2. McKnight, D.H., Chervany, N.L.: The Meanings of Trust. Technical Report MISRC Working Paper Series 96-04, University of Minnesota, Management Information Systems Research Center (1996), http://misrc.umn.edu/wpaper/
3. March, S.P.: Formalising Trust as a Computational Concept. In: Computing Science and Mathematics, p. 170. University of Stirling (1994)
4. Jøsang, A.: Artificial Reasoning with Subjective Logic. In: 2nd Australian Workshop on Commonsense Reasoning (1997), http://www.idt.ntnu.no/~ajos/papers.html
5. Lecture Notes in Computer Science;A. Jøsang,1998