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@article{DE_1972_8_5_a0, author = {E. E. Barbashina}, title = {On the theory of necessary second order optimality {conditions.~II}}, journal = {Differencialʹnye uravneni\^a}, pages = {751--761}, publisher = {mathdoc}, volume = {8}, number = {5}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_5_a0/} }
E. E. Barbashina. On the theory of necessary second order optimality conditions.~II. Differencialʹnye uravneniâ, Tome 8 (1972) no. 5, pp. 751-761. http://geodesic.mathdoc.fr/item/DE_1972_8_5_a0/