%0 Journal Article %A N. I. Pogodaev %A M. V. Staritsyn %T Exact formulae for the increment of the objective functional and necessary optimality conditions, alternative to Pontryagin's maximum principle %J Sbornik. Mathematics %D 2024 %P 790-822 %V 215 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2024_215_6_a4/ %G en %F SM_2024_215_6_a4