%0 Journal Article %A V. F. Butuzov %A V. V. Kiryushin %T A step-type contrast structure in the case of a multiple root of the equation for a transition point %J Differencialʹnye uravneniâ %D 1998 %P 1029-1038 %V 34 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1998_34_8_a2/ %G ru %F DE_1998_34_8_a2