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@article{DE_1990_26_10_a9, author = {A. Ya. Lepin}, title = {Existence of solutions of boundary value problems for a second-order equation}, journal = {Differencialʹnye uravneni\^a}, pages = {1729--1737}, publisher = {mathdoc}, volume = {26}, number = {10}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1990_26_10_a9/} }
A. Ya. Lepin. Existence of solutions of boundary value problems for a second-order equation. Differencialʹnye uravneniâ, Tome 26 (1990) no. 10, pp. 1729-1737. http://geodesic.mathdoc.fr/item/DE_1990_26_10_a9/