%0 Journal Article %A M. I. Gil' %T Estimates of the norm of the resolvent of a non-self-adjoint operator which is “nearly” self-adjoint or unitary %J Matematičeskie zametki %D 1983 %P 161-167 %V 33 %N 2 %U http://geodesic.mathdoc.fr/item/MZM_1983_33_2_a0/ %G ru %F MZM_1983_33_2_a0