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@article{DAN_1957_117_3_a4, author = {A. E. Martynyuk}, title = {On a generalization of the variation method}, journal = {Doklady Akademii Nauk}, pages = {374--377}, publisher = {mathdoc}, volume = {117}, number = {3}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_117_3_a4/} }
A. E. Martynyuk. On a generalization of the variation method. Doklady Akademii Nauk, Tome 117 (1957) no. 3, pp. 374-377. http://geodesic.mathdoc.fr/item/DAN_1957_117_3_a4/