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@article{DAN_1973_209_4_a3, author = {A. K. Guts}, title = {On mappings of families of sets}, journal = {Doklady Akademii Nauk}, pages = {773--774}, publisher = {mathdoc}, volume = {209}, number = {4}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_209_4_a3/} }
A. K. Guts. On mappings of families of sets. Doklady Akademii Nauk, Tome 209 (1973) no. 4, pp. 773-774. http://geodesic.mathdoc.fr/item/DAN_1973_209_4_a3/