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@article{DAN_1988_298_6_a14, author = {A. L. \v{S}taras}, title = {The averaging method for weakly nonlinear equations}, journal = {Doklady Akademii Nauk}, pages = {1345--1348}, publisher = {mathdoc}, volume = {298}, number = {6}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1988_298_6_a14/} }
A. L. Štaras. The averaging method for weakly nonlinear equations. Doklady Akademii Nauk, Tome 298 (1988) no. 6, pp. 1345-1348. http://geodesic.mathdoc.fr/item/DAN_1988_298_6_a14/