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@article{DAN_1965_161_2_a10, author = {V. Proizvolov}, title = {On the pointwise and integral cardinality of systems of subsets of a topological space}, journal = {Doklady Akademii Nauk}, pages = {296--299}, publisher = {mathdoc}, volume = {161}, number = {2}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_161_2_a10/} }
V. Proizvolov. On the pointwise and integral cardinality of systems of subsets of a topological space. Doklady Akademii Nauk, Tome 161 (1965) no. 2, pp. 296-299. http://geodesic.mathdoc.fr/item/DAN_1965_161_2_a10/