Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1971_198_3_a3, author = {A. E. Gel'man}, title = {A fixed point principle}, journal = {Doklady Akademii Nauk}, pages = {506--508}, publisher = {mathdoc}, volume = {198}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_3_a3/} }
A. E. Gel'man. A fixed point principle. Doklady Akademii Nauk, Tome 198 (1971) no. 3, pp. 506-508. http://geodesic.mathdoc.fr/item/DAN_1971_198_3_a3/