TY - JOUR AU - R. M. Sharipova TI - Properties of a certain class of degenerate elliptic systems of second order equations JO - Differencialʹnye uravneniâ PY - 1973 SP - 2280 EP - 2283 VL - 9 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1973_9_12_a28/ LA - ru ID - DE_1973_9_12_a28 ER -