TY - JOUR AU - O. A. Liskovets TI - Discrete convergence of elements and operators for ill-posed JO - Doklady Akademii Nauk PY - 1985 SP - 1058 EP - 1062 VL - 280 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1985_280_5_a7/ LA - ru ID - DAN_1985_280_5_a7 ER -