TY - JOUR AU - D. A. Krupskaya TI - The regularity of boundary points for second order degenerate elliptic equations JO - Differencialʹnye uravneniâ PY - 1977 SP - 654 EP - 667 VL - 13 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1977_13_4_a8/ LA - ru ID - DE_1977_13_4_a8 ER -