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@article{DE_1984_20_2_a22, author = {L. A. Kalyakin}, title = {Asymptotic integration of hyperbolic equations with weakly nonlinear perturbation}, journal = {Differencialʹnye uravneni\^a}, pages = {351--353}, publisher = {mathdoc}, volume = {20}, number = {2}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1984_20_2_a22/} }
L. A. Kalyakin. Asymptotic integration of hyperbolic equations with weakly nonlinear perturbation. Differencialʹnye uravneniâ, Tome 20 (1984) no. 2, pp. 351-353. http://geodesic.mathdoc.fr/item/DE_1984_20_2_a22/