Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1965_160_1_a3, author = {A. Ya. Dubovitskii and A. A. Milyutin}, title = {Second variations in extremal problems with constraints}, journal = {Doklady Akademii Nauk}, pages = {18--21}, publisher = {mathdoc}, volume = {160}, number = {1}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_160_1_a3/} }
A. Ya. Dubovitskii; A. A. Milyutin. Second variations in extremal problems with constraints. Doklady Akademii Nauk, Tome 160 (1965) no. 1, pp. 18-21. http://geodesic.mathdoc.fr/item/DAN_1965_160_1_a3/