Leray, Jean <br/><br/>
Lagrangian analysis and quantum mechanics  ; a mathematical structure related to asymptotic expansions and the Maslov index / 

 - Cambridge:  MIT Press,  1981 
 - xvi, 271p. Index 
<br/><br/> "English translation by Carolyn Schroeder" 
<br/><br/><label>Dewey Class. No.: </label>530.1  / L614.LA