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@article{DE_1972_8_4_a1, author = {A. B. Vasil'eva}, title = {The influence of local perturbations on the solution of a boundary value problem}, journal = {Differencialʹnye uravneni\^a}, pages = {581--589}, publisher = {mathdoc}, volume = {8}, number = {4}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_4_a1/} }
A. B. Vasil'eva. The influence of local perturbations on the solution of a boundary value problem. Differencialʹnye uravneniâ, Tome 8 (1972) no. 4, pp. 581-589. http://geodesic.mathdoc.fr/item/DE_1972_8_4_a1/