TY - JOUR AU - B. G. Gabdulkhaev TI - Optimization of direct and projection methods for solving operator equations JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1999 SP - 3 EP - 18 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1999_12_a0/ LA - ru ID - IVM_1999_12_a0 ER -