%0 Journal Article %A A. V. Dmitruk %T Variations of $v$-change of time in an~optimal control problem with state and mixed constraints %J Izvestiya. Mathematics %D 2023 %P 726-767 %V 87 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2023_87_4_a2/ %G en %F IM2_2023_87_4_a2