%0 Journal Article %A V. I. Sumin %A A. V. Chernov %T On some criteria for the quasinilpotency of functional operators %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2000 %P 77-80 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2000_2_a11/ %G ru %F IVM_2000_2_a11