%0 Journal Article
%A Birman, Mikhail Sh.
%T Discrete spectrum of the periodic elliptic operator with a differential perturbation
%J Journées équations aux dérivées partielles
%D 1994
%P 1-4
%I Ecole polytechnique
%U https://www.numdam.org/articles/10.5802/jedp.469/
%R 10.5802/jedp.469
%G en
%F JEDP_1994____A14_0