%0 Journal Article
%A E. V. Kirillov
%A G. A. Zakirova
%T A direct spectral problem for $L$-spectrum of the perturbed operator with a multiple spectrum
%J Journal of computational and engineering mathematics
%D 2017
%P 19-26
%V 4
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JCEM_2017_4_3_a2/
%G en
%F JCEM_2017_4_3_a2