Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_12_a2, author = {V. D. Batukhtin}, title = {The differentiability of the cost of a differential approach game}, journal = {Differencialʹnye uravneni\^a}, pages = {2140--2148}, publisher = {mathdoc}, volume = {8}, number = {12}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_12_a2/} }
V. D. Batukhtin. The differentiability of the cost of a differential approach game. Differencialʹnye uravneniâ, Tome 8 (1972) no. 12, pp. 2140-2148. http://geodesic.mathdoc.fr/item/DE_1972_8_12_a2/