%0 Journal Article %A L. A. Manita %T The behaviour of extremals in the neighbourhood of singular regimes and non-smooth Liapunov functions in optimal control problems %J Fundamentalʹnaâ i prikladnaâ matematika %D 1996 %P 411-447 %V 2 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FPM_1996_2_2_a3/ %G ru %F FPM_1996_2_2_a3