Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1967_175_3_a2, author = {A. G. El'kin}, title = {$A$-sets in complete metric spaces}, journal = {Doklady Akademii Nauk}, pages = {517--520}, publisher = {mathdoc}, volume = {175}, number = {3}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_175_3_a2/} }
A. G. El'kin. $A$-sets in complete metric spaces. Doklady Akademii Nauk, Tome 175 (1967) no. 3, pp. 517-520. http://geodesic.mathdoc.fr/item/DAN_1967_175_3_a2/