TY - JOUR AU - Ya. S. Baris TI - The reduction principle for a singularly perturbed system JO - Differencialʹnye uravneniâ PY - 1979 SP - 1390 EP - 1394 VL - 15 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1979_15_8_a2/ LA - ru ID - DE_1979_15_8_a2 ER -