@article{DAN_1975_223_4_a1,
     author = {V. A. Vershinin},
     title = {On the question of the superposability of constructive sets with equality},
     journal = {Doklady Akademii Nauk},
     pages = {781--784},
     publisher = {mathdoc},
     volume = {223},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_223_4_a1/}
}