%0 Journal Article
%A V. G. Zvyagin
%T The zero point index of a completely continuous perturbation of a Fredholm mapping that commutes with the action of a torus
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1997
%P 47-55
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1997_2_a3/
%G ru
%F IVM_1997_2_a3