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@article{DE_1981_17_8_a15, author = {M. V. Dolov}, title = {The structure of a single-valued integrating factor near a cycle}, journal = {Differencialʹnye uravneni\^a}, pages = {1490--1492}, publisher = {mathdoc}, volume = {17}, number = {8}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1981_17_8_a15/} }
M. V. Dolov. The structure of a single-valued integrating factor near a cycle. Differencialʹnye uravneniâ, Tome 17 (1981) no. 8, pp. 1490-1492. http://geodesic.mathdoc.fr/item/DE_1981_17_8_a15/