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@article{AA_2002_14_3_a8, author = {A. V. Pajitnov}, title = {On closed orbits of gradient flows for circle-valued mappings}, journal = {Algebra i analiz}, pages = {186--240}, publisher = {mathdoc}, volume = {14}, number = {3}, year = {2002}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_2002_14_3_a8/} }
A. V. Pajitnov. On closed orbits of gradient flows for circle-valued mappings. Algebra i analiz, Tome 14 (2002) no. 3, pp. 186-240. http://geodesic.mathdoc.fr/item/AA_2002_14_3_a8/