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@article{TIMB_2007_15_1_a4, author = {A. V. Guminskaya and P. P. Zabreiko}, title = {On {Hopf's} theorems for relative rotation}, journal = {Trudy Instituta matematiki}, pages = {33--46}, publisher = {mathdoc}, volume = {15}, number = {1}, year = {2007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TIMB_2007_15_1_a4/} }
A. V. Guminskaya; P. P. Zabreiko. On Hopf's theorems for relative rotation. Trudy Instituta matematiki, Tome 15 (2007) no. 1, pp. 33-46. http://geodesic.mathdoc.fr/item/TIMB_2007_15_1_a4/