%0 Journal Article
%A V. E. Slyusarchuk
%T Estimates of the spectra and the invertibility of functional operators
%J Sbornik. Mathematics
%D 1978
%P 243-258
%V 34
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1978_34_2_a7/
%G en
%F SM_1978_34_2_a7