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@article{DE_1977_13_6_a0, author = {V. V. Amel'kin}, title = {On the question of the isochronism of the center of two-dimensional analytic differential systems}, journal = {Differencialʹnye uravneni\^a}, pages = {971--980}, publisher = {mathdoc}, volume = {13}, number = {6}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1977_13_6_a0/} }
TY - JOUR AU - V. V. Amel'kin TI - On the question of the isochronism of the center of two-dimensional analytic differential systems JO - Differencialʹnye uravneniâ PY - 1977 SP - 971 EP - 980 VL - 13 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1977_13_6_a0/ LA - ru ID - DE_1977_13_6_a0 ER -
V. V. Amel'kin. On the question of the isochronism of the center of two-dimensional analytic differential systems. Differencialʹnye uravneniâ, Tome 13 (1977) no. 6, pp. 971-980. http://geodesic.mathdoc.fr/item/DE_1977_13_6_a0/