%0 Journal Article %A A. Ya. Kazakov %T On condition of a “breakdown” in the singularly perturbed systems %J Zapiski Nauchnykh Seminarov POMI %D 1992 %P 83-91 %V 203 %U http://geodesic.mathdoc.fr/item/ZNSL_1992_203_a6/ %G ru %F ZNSL_1992_203_a6