%0 Journal Article %A V. E. Kapustyan %T A direct method for solving a singularly perturbed problem of the optimal control of a particle transport process %J Differencialʹnye uravneniâ %D 1992 %P 1230-1243 %V 28 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1992_28_7_a15/ %G ru %F DE_1992_28_7_a15