%0 Journal Article %A P. E. Tovstik %T Integrals of a linear equation of order $m+n$ with a small parameter multiplying the derivatives %J Differencialʹnye uravneniâ %D 1970 %P 989-999 %V 6 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1970_6_6_a4/ %G ru %F DE_1970_6_6_a4