%0 Journal Article %A I. V. Kurbatova %T Functional calculus generated by a~square pencil %J Zapiski Nauchnykh Seminarov POMI %D 2011 %P 113-130 %V 389 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2011_389_a6/ %G ru %F ZNSL_2011_389_a6