00291nam a2200109Ia 4500100001400000110002800014245005500042260002400097300000900121490004600130490000500176  aVoros, A.  aUniversite de Paris-Sud  aSpectre de l'equation de shrodinger et methode BKW  aOrsay, Francec1981  a74p.  aPublications Mathematiques D'Orsay; 81-09  a