%0 Journal Article
%A P. P. Zabreiko
%A O. Y. Kushel
%T Gantmakher--Krein theorem for $2$-completely nonnegative operators in ideal spaces
%J Trudy Instituta matematiki
%D 2009
%P 51-60
%V 17
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMB_2009_17_1_a4/
%G ru
%F TIMB_2009_17_1_a4