%0 Journal Article %A A. P. Afanas'ev %T A first-order local variational problem for nonlinear optimal control problems with mixed constraints %J Differencialʹnye uravneniâ %D 1995 %P 1796-1802 %V 31 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1995_31_11_a2/ %G ru %F DE_1995_31_11_a2