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@article{DAN_1963_153_2_a11, author = {A. I. Fet}, title = {Extremal problems for surfaces of bounded {Gaussian} curvature}, journal = {Doklady Akademii Nauk}, pages = {292--295}, publisher = {mathdoc}, volume = {153}, number = {2}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_2_a11/} }
A. I. Fet. Extremal problems for surfaces of bounded Gaussian curvature. Doklady Akademii Nauk, Tome 153 (1963) no. 2, pp. 292-295. http://geodesic.mathdoc.fr/item/DAN_1963_153_2_a11/