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@article{DE_1989_25_6_a6, author = {A. M. Samoilenko and R. I. Petrishin}, title = {The averaging method in some boundary value problems}, journal = {Differencialʹnye uravneni\^a}, pages = {956--964}, publisher = {mathdoc}, volume = {25}, number = {6}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1989_25_6_a6/} }
A. M. Samoilenko; R. I. Petrishin. The averaging method in some boundary value problems. Differencialʹnye uravneniâ, Tome 25 (1989) no. 6, pp. 956-964. http://geodesic.mathdoc.fr/item/DE_1989_25_6_a6/