@article{PIM_1974_N_S_17_31_a17,
     author = {Momir S. Stojanovi\'c},
     title = {On multivalued quotient mappings},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {155 },
     publisher = {mathdoc},
     volume = {_N_S_17},
     number = {31},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/PIM_1974_N_S_17_31_a17/}
}