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@article{DAN_1973_211_4_a4, author = {A. B. Katok}, title = {Invariant measures of flows on oriented surfaces}, journal = {Doklady Akademii Nauk}, pages = {775--778}, publisher = {mathdoc}, volume = {211}, number = {4}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_211_4_a4/} }
A. B. Katok. Invariant measures of flows on oriented surfaces. Doklady Akademii Nauk, Tome 211 (1973) no. 4, pp. 775-778. http://geodesic.mathdoc.fr/item/DAN_1973_211_4_a4/