TY - JOUR AU - E. M. Landis TI - Harnack's inequality for second order elliptic equations of Cordes type JO - Doklady Akademii Nauk PY - 1968 SP - 1272 EP - 1275 VL - 179 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1968_179_6_a5/ LA - ru ID - DAN_1968_179_6_a5 ER -