%0 Journal Article %A S. Karimov %T Asymptotics of solutions of a class of differential equations with a small parameter multiplying the derivative in the case of change of stability of a focus %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1980 %P 57-64 %V 147 %U http://geodesic.mathdoc.fr/item/TM_1980_147_a4/ %G ru %F TM_1980_147_a4