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@article{DE_1968_4_8_a3, author = {A. E. Gel'man}, title = {The approximate determination of periodic modes in high frequency processes}, journal = {Differencialʹnye uravneni\^a}, pages = {1396--1403}, publisher = {mathdoc}, volume = {4}, number = {8}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_8_a3/} }
A. E. Gel'man. The approximate determination of periodic modes in high frequency processes. Differencialʹnye uravneniâ, Tome 4 (1968) no. 8, pp. 1396-1403. http://geodesic.mathdoc.fr/item/DE_1968_4_8_a3/