1. C. Altenschmidt, J. Biskup, U. Flegel and Y. Karabulut: Secure Mediation: Requirements, Design and Architecture. Journal of Computer Security, 11(3):365–398, 2003.
2. J. Biskup and Y. Karabulut: A Hybrid PKI Model with an Application for Secure Mediation. In 16th Annual IFIP WG 11.3 Working Conference on Data and Application Security, pages 271–282, Cambridge, England, July 2002. Kluwer Academic Press.
3. J. Biskup and Y. Karabulut: Mediating Between Strangers: A Trust Management Based Approach. In 2nd Annual PKI Research Workshop, pages 80–95, Gaithersburg, Maryland, USA, April 2003.
4. B. Chinowsky: Summary of the panel discussions Dueling Theologies. In 1st Annual PKI Workshop, Gaithersburg, Maryland, USA, Apr. 2002.
5. Y. Karabulut: Investigating Trust Management Approaches for Trustworthy Business Processing for Dynamic Virtual Organizations. Special Session on Security and Privacy in E-Commerce within the 7th International Conference on Electronic Commerce Research, INFOMART, Dallas, June 2004.