Fixed point theorems for multivalued mappings in probabilistic metric spaces. - Olga Hadzic (Fuzzy Sets Syst., 1997)

A fixed point theorem for multivalued mappings in probabilistic metric spaces and an application in fuzzy metric spaces. - Olga Hadzic; Endre Pap (Fuzzy Sets Syst., 2002)

Probabilistic Multi-Valued Contractions and Decomposable Measures. - Olga Hadzic; Endre Pap (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2002)

Countable extension of triangular norms and their applications to the fixed point theory in probabilistic metric spaces. - Olga Hadzic; Endre Pap; Mirko Budincevic (Kybernetika, 2002)

A generalization of Tardiff's fixed point theorem in probabilistic metric spaces and applications to random equations. - Olga Hadzic; Endre Pap; Mirko Budincevic (Fuzzy Sets Syst., 2005)

Moderating and Mediating Variables in Psychological Research. - Petar Milin; Olga Hadzic (International Encyclopedia of Statistical Science, 2011)