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@article{DE_1976_12_11_a3, author = {M. V. Dolov}, title = {The canonical integral in the neighborhood of a focus}, journal = {Differencialʹnye uravneni\^a}, pages = {1946--1953}, publisher = {mathdoc}, volume = {12}, number = {11}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_11_a3/} }
M. V. Dolov. The canonical integral in the neighborhood of a focus. Differencialʹnye uravneniâ, Tome 12 (1976) no. 11, pp. 1946-1953. http://geodesic.mathdoc.fr/item/DE_1976_12_11_a3/