%0 Journal Article
%A B.Helffer
%A D. Robert
%A X. P. Wang
%T Semiclassical analysis of a~nonlinear eigenvalue problem and nonanalytic hypoellipticity
%J Algebra i analiz
%D 2004
%P 320-334
%V 16
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AA_2004_16_1_a10/
%G ru
%F AA_2004_16_1_a10