1. Contractors and Contractor Directions, Theory and Applications;Altman,1977
2. Probabilistic contractor and the solutions for nonlinear operator equations in PN-spaces;Chang;Chinese Sci. Bull.,1990
3. S.S. Chang, Y.J. Cho, S.M. Kang, Probabilistic Metric Spaces and Nonlinear Operator Theory, Sichuan University Press, 1994.
4. On the existence and uniqueness problems of solutions for set-valued nonlinear operator equations in Menger PN-spaces;Chang;Internat. J. Math. Math. Sci.,1994
5. Probabilistic contractor couple and the solutions for nonlinear operator equations in non-Archimedean Menger PN-spaces;Chang;Appl. Math. Mech.,1991