@article{MMO_1970_23_a7,
     author = {M. M. Choban},
     title = {Many-valued mappings and {Borel} {sets.~I.~II.}},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {277--301},
     publisher = {mathdoc},
     volume = {23},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1970_23_a7/}
}