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@article{DAN_1957_115_2_a13, author = {R. L. Frum-Ketkov}, title = {The behaviour of cycles in the continuous mapping of compacts}, journal = {Doklady Akademii Nauk}, pages = {249--252}, publisher = {mathdoc}, volume = {115}, number = {2}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_115_2_a13/} }
R. L. Frum-Ketkov. The behaviour of cycles in the continuous mapping of compacts. Doklady Akademii Nauk, Tome 115 (1957) no. 2, pp. 249-252. http://geodesic.mathdoc.fr/item/DAN_1957_115_2_a13/