%0 Journal Article %A G. A. Kolokol'nikova %T Using Transformation Methods to Describe Discontinuous Trajectories in Problems with Phase Constraints %J Differencialʹnye uravneniâ %D 2001 %P 323-327 %V 37 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2001_37_3_a3/ %G ru %F DE_2001_37_3_a3