%0 Journal Article
%A D. M. Polyakov
%T On spectral properties of fourth order differential operator with periodic and semiperiodic boundary conditions
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 2015
%P 75-79
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_2015_5_a8/
%G ru
%F IVM_2015_5_a8