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@article{DAN_1971_197_2_a12, author = {I. V. Shragin}, title = {Conditions for measurability of superpositions}, journal = {Doklady Akademii Nauk}, pages = {295--298}, publisher = {mathdoc}, volume = {197}, number = {2}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_197_2_a12/} }
I. V. Shragin. Conditions for measurability of superpositions. Doklady Akademii Nauk, Tome 197 (1971) no. 2, pp. 295-298. http://geodesic.mathdoc.fr/item/DAN_1971_197_2_a12/