@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/}
}