%0 Journal Article %A V. F. Butuzov %A V. V. Kiryushin %T A Step-Like Contrast Structure for the Case of a Multiple Root of the Transition Point Equation (the Critical Case) %J Differencialʹnye uravneniâ %D 2001 %P 171-180 %V 37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2001_37_2_a3/ %G ru %F DE_2001_37_2_a3