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@article{DE_1991_27_4_a23, author = {E. G. Sitnikova}, title = {A boundary value problem in the disk}, journal = {Differencialʹnye uravneni\^a}, pages = {711--713}, publisher = {mathdoc}, volume = {27}, number = {4}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_4_a23/} }
E. G. Sitnikova. A boundary value problem in the disk. Differencialʹnye uravneniâ, Tome 27 (1991) no. 4, pp. 711-713. http://geodesic.mathdoc.fr/item/DE_1991_27_4_a23/