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@article{DE_1988_24_4_a18, author = {E. K. Ershov}, title = {On structurally stable polynomial diffeomorphisms of the unit circle}, journal = {Differencialʹnye uravneni\^a}, pages = {687--689}, publisher = {mathdoc}, volume = {24}, number = {4}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1988_24_4_a18/} }
E. K. Ershov. On structurally stable polynomial diffeomorphisms of the unit circle. Differencialʹnye uravneniâ, Tome 24 (1988) no. 4, pp. 687-689. http://geodesic.mathdoc.fr/item/DE_1988_24_4_a18/