%0 Journal Article
%A S. A. Nazarov
%T Gap opening around a given point of the spectrum of a cylindrical waveguide by means of gentle periodic perturbation of walls
%J Zapiski Nauchnykh Seminarov POMI
%D 2014
%P 90-130
%V 422
%U http://geodesic.mathdoc.fr/item/ZNSL_2014_422_a5/
%G ru
%F ZNSL_2014_422_a5