Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1968_181_6_a11, author = {V. V. Filippov}, title = {Quotient $s$-maps}, journal = {Doklady Akademii Nauk}, pages = {1343--1345}, publisher = {mathdoc}, volume = {181}, number = {6}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_6_a11/} }
V. V. Filippov. Quotient $s$-maps. Doklady Akademii Nauk, Tome 181 (1968) no. 6, pp. 1343-1345. http://geodesic.mathdoc.fr/item/DAN_1968_181_6_a11/