@article{DAN_1962_144_5_a1,
     author = {I. U. Bronshtein},
     title = {Dynamical systems without uniqueness as semigroups of non-single-valued mappings of a topological space},
     journal = {Doklady Akademii Nauk},
     pages = {954--957},
     publisher = {mathdoc},
     volume = {144},
     number = {5},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_144_5_a1/}
}