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@article{DAN_1968_183_6_a3, author = {E. S. Levitin}, title = {Necessary and sufficient conditions under which a given sequence is minimizing}, journal = {Doklady Akademii Nauk}, pages = {1250--1253}, publisher = {mathdoc}, volume = {183}, number = {6}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_6_a3/} }
E. S. Levitin. Necessary and sufficient conditions under which a given sequence is minimizing. Doklady Akademii Nauk, Tome 183 (1968) no. 6, pp. 1250-1253. http://geodesic.mathdoc.fr/item/DAN_1968_183_6_a3/