TY - JOUR AU - V. I. Meleshko AU - V. M. Zadachin TI - Factorizations and pseudo-inversions of singular perturbed matrices with nonfixed signs JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1987 SP - 42 EP - 50 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1987_11_a6/ LA - ru ID - IVM_1987_11_a6 ER -