%0 Journal Article %A I. V. Zakharova %T On some problems for partial differential equations with a small parameter in the principal part %J Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory %D 2020 %P 61-72 %V 183 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTO_2020_183_a5/ %G ru %F INTO_2020_183_a5