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@article{DAN_1985_283_3_a9, author = {A. I. Subbotin and A. M. Tarasyev}, title = {Conjugate derivatives of the value function of a differential}, journal = {Doklady Akademii Nauk}, pages = {559--564}, publisher = {mathdoc}, volume = {283}, number = {3}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1985_283_3_a9/} }
A. I. Subbotin; A. M. Tarasyev. Conjugate derivatives of the value function of a differential. Doklady Akademii Nauk, Tome 283 (1985) no. 3, pp. 559-564. http://geodesic.mathdoc.fr/item/DAN_1985_283_3_a9/