TY - JOUR AU - B. I. Medvedev TI - An asymptotic solution of ordinary second order differential equations JO - Differencialʹnye uravneniâ PY - 1971 SP - 2111 EP - 2114 VL - 7 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1971_7_11_a23/ LA - ru ID - DE_1971_7_11_a23 ER -