Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1958_118_2_a7, author = {Ya. L. Kreinin}, title = {About a property of sets effectively different from all $\Phi$-sets}, journal = {Doklady Akademii Nauk}, pages = {237--238}, publisher = {mathdoc}, volume = {118}, number = {2}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1958_118_2_a7/} }
Ya. L. Kreinin. About a property of sets effectively different from all $\Phi$-sets. Doklady Akademii Nauk, Tome 118 (1958) no. 2, pp. 237-238. http://geodesic.mathdoc.fr/item/DAN_1958_118_2_a7/