Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_10_a2, author = {V. G. Boltyanskii}, title = {Criteria for the optimality of discrete processes}, journal = {Differencialʹnye uravneni\^a}, pages = {1745--1752}, publisher = {mathdoc}, volume = {8}, number = {10}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_10_a2/} }
V. G. Boltyanskii. Criteria for the optimality of discrete processes. Differencialʹnye uravneniâ, Tome 8 (1972) no. 10, pp. 1745-1752. http://geodesic.mathdoc.fr/item/DE_1972_8_10_a2/