Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1961_140_5_a2, author = {V. G. Boltyanskii}, title = {Sufficient conditions for optimality}, journal = {Doklady Akademii Nauk}, pages = {994--997}, publisher = {mathdoc}, volume = {140}, number = {5}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_5_a2/} }
V. G. Boltyanskii. Sufficient conditions for optimality. Doklady Akademii Nauk, Tome 140 (1961) no. 5, pp. 994-997. http://geodesic.mathdoc.fr/item/DAN_1961_140_5_a2/