Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1967_176_5_a13, author = {A. M. Stepin}, title = {Square roots of metric automorphisms}, journal = {Doklady Akademii Nauk}, pages = {1023--1026}, publisher = {mathdoc}, volume = {176}, number = {5}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_5_a13/} }
A. M. Stepin. Square roots of metric automorphisms. Doklady Akademii Nauk, Tome 176 (1967) no. 5, pp. 1023-1026. http://geodesic.mathdoc.fr/item/DAN_1967_176_5_a13/