1. Barone, Joseph M; Filev, Dimitar P; and Yager, Ronald R: (1993) “Exponential Possibility Distributions and the Mountain Method”, in: Proc. NAFIPS 1993, ed. M. McAllister, pp. 118–122, Allentown PA
2. Cellier, Francois: (1987) “Qualitative Simulation of Technical Systems Using the GSPS Framework”, Int. J. of General Systems, v. 13:4, pp. 333–344
3. Coad, Peter and Yourdon, Edward: (1991) Object-Oriented Analysis, Prentice-Hall, Englewood Cliffs NJ
4. Dubois, Didier and Prade, Henri: (1988) Possibility Theory, Plenum Press, New York
5. Galway, L: (1986) “Workstation Based Environment for the Statistical Analysis of Set-Valued Data”, in: Computer Science and Statistics: Proceedings of the 18th Symposium on the Interface, pp. 332–334