R. Agrawal, T. Imielinski, und A. Swami. Proceedings of the 1993 ACM SIGMOD International Conference on Management of Data, Volume 22 von SIGMOD '93, Seite 207--216. New York, NY, USA, ACM, (1993)
R. Lewick, und B. Bunker. Trust in organizations: Frontiers of theory and research, Volume 1 von Trust in organizations: Frontiers of theory and research, Palgrave Macmillan, (1995)