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@article{DAN_1962_147_3_a11, author = {A. G. Teterev}, title = {Extremal properties of solutions of elliptic equations}, journal = {Doklady Akademii Nauk}, pages = {559--561}, publisher = {mathdoc}, volume = {147}, number = {3}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_3_a11/} }
A. G. Teterev. Extremal properties of solutions of elliptic equations. Doklady Akademii Nauk, Tome 147 (1962) no. 3, pp. 559-561. http://geodesic.mathdoc.fr/item/DAN_1962_147_3_a11/