TY - JOUR AU - V. I. Kachalov TI - Smoothness of solutions of differential equations that contain a parameter JO - Differencialʹnye uravneniâ PY - 1990 SP - 1711 EP - 1716 VL - 26 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1990_26_10_a6/ LA - ru ID - DE_1990_26_10_a6 ER -