TY - JOUR AU - T. H. Rasulov AU - E. B. Dilmurodov TI - Investigations of the Numerical Range of a Operator Matrix JO - Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences PY - 2014 SP - 50 EP - 63 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VSGTU_2014_2_a4/ LA - ru ID - VSGTU_2014_2_a4 ER -