TY - JOUR AU - I. V. Gaishun AU - N. A. Portyanko TI - Regular multidimensional differential equations JO - Differencialʹnye uravneniâ PY - 1985 SP - 1071 EP - 1073 VL - 21 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1985_21_6_a20/ LA - ru ID - DE_1985_21_6_a20 ER -