@article{PIM_1975_N_S_18_32_a6,
     author = {Ljubomir B. \'Ciri\'c},
     title = {On {Fixed} {Points} {Of} {Generalized} {Contractions} {On} {Probabilistic} {Metric} {Spaces}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {71 },
     publisher = {mathdoc},
     volume = {_N_S_18},
     number = {32},
     year = {1975},
     url = {http://geodesic.mathdoc.fr/item/PIM_1975_N_S_18_32_a6/}
}