Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1976_226_4_a3, author = {V. V. Velichenko}, title = {On sufficient conditions for optimality for multisheeted fields of extremals}, journal = {Doklady Akademii Nauk}, pages = {757--760}, publisher = {mathdoc}, volume = {226}, number = {4}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_4_a3/} }
V. V. Velichenko. On sufficient conditions for optimality for multisheeted fields of extremals. Doklady Akademii Nauk, Tome 226 (1976) no. 4, pp. 757-760. http://geodesic.mathdoc.fr/item/DAN_1976_226_4_a3/