%0 Journal Article %A R. Hildebrand %T Classification of phase portraits of optimal syntheses %J Fundamentalʹnaâ i prikladnaâ matematika %D 2001 %P 199-233 %V 7 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FPM_2001_7_1_a11/ %G ru %F FPM_2001_7_1_a11