TY - JOUR AU - S. Karimov TI - 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 JO - Informatics and Automation PY - 1980 SP - 57 EP - 64 VL - 147 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1980_147_a4/ LA - ru ID - TRSPY_1980_147_a4 ER -