[1] Zhang Shi-sheng, Fixed point theorems of mappings on probabilistic metric spaces with applications, Scientia Sinica (Series A), 26, 11 (1983), 1144-1155.
[2] Zhang Shi-sheng, Fixed Point Theory and Applications, Chongqing Press, Chongqing (1984). (in Chinese).
[3] Zhang Shi-sheng, On the theory of probabilistic metric spaces with applications, Acta Math. Sinica, New Series, 1,4 (1985), 366-377.
[4] Zhang Shi-sheng, The metrization of probabilistic metric spaces with applications, Zbornik Radova Prirodno-Matematickog Fakulteta u Novom Sadu, Serijaza Matematiku, 15, 1 (1985), 107-117.
[5] Hicks, T.L. and P.L. Sharma, Probabilistic metric structures: Topological classification, Ibid, 14, 1 (1984), 35-42.
[6] Hicks, T.L. and P.L. Sharma, Random normed structures, Ibid, 14, 1 (1984), 43-50.
[7] Hadzic, O., Some fixed point theorems in probabilistic metric spaces, Ibid, 15, 1 (1985), 23-36.
[8] Radu, V., On some fixed point theorems in probabilistic metric spaces, Seminarul de Teoria Probabilitatilor si Applicatii, 74 (1985), 1-10.
[9] Constantin, Gh., On some classes of contraction mappings in Menger spaces, Ibid, 76 (1981), 1-10.
[10] Schweizer, B., A. Sklar and E. Thorp, The metrization of statistical metric spaces, Pacific J. Math., 10 (1960), 673-675.
[11] Schweizer, B. and A. Sklar, Probabilistic Metric Spaces, North-Holland, New York, Amsterdam, Oxford (1983).
[12] Engelking, R., General Topology, Warszawa (1977).
[13] Nadler, S.B., Multi-valued contraction mappings, Pacific J. Math., 30 (1969), 475-487.