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@article{DAN_1978_240_2_a1, author = {A. N. Bautin}, title = {On the small parameter method}, journal = {Doklady Akademii Nauk}, pages = {253--256}, publisher = {mathdoc}, volume = {240}, number = {2}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1978_240_2_a1/} }
A. N. Bautin. On the small parameter method. Doklady Akademii Nauk, Tome 240 (1978) no. 2, pp. 253-256. http://geodesic.mathdoc.fr/item/DAN_1978_240_2_a1/