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@article{DAN_1969_189_3_a11, author = {M. I. \`Eskin}, title = {A boundary value problem for an overdetermined system of two second order equations}, journal = {Doklady Akademii Nauk}, pages = {491--494}, publisher = {mathdoc}, volume = {189}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_189_3_a11/} }
M. I. Èskin. A boundary value problem for an overdetermined system of two second order equations. Doklady Akademii Nauk, Tome 189 (1969) no. 3, pp. 491-494. http://geodesic.mathdoc.fr/item/DAN_1969_189_3_a11/