%0 Journal Article
%A V. M. Babich
%T The focussing problem and spectral function asymptotics of Laplace– Beltrami operator. II
%J Zapiski Nauchnykh Seminarov POMI
%D 1979
%P 14-53
%V 89
%U http://geodesic.mathdoc.fr/item/ZNSL_1979_89_a1/
%G ru
%F ZNSL_1979_89_a1