TY - JOUR AU - A. S. Leonov TI - On some algorithms for solving ill-posed extremal problems JO - Sbornik. Mathematics PY - 1987 SP - 229 EP - 242 VL - 57 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1987_57_1_a14/ LA - en ID - SM_1987_57_1_a14 ER -