Mishchenko, A.S., et al <br/><br/>
Lagrangian manifolds & the maslov operator 
A.S. Mishchenko, et al 
 - Berlin  Springer  1990 
 - x  395 
<br/><br/><label>ISBN: </label>3-540-13613-4 
<br/><br/><label>Dewey Class. No.: </label>8.06+4.12+10.01+14.08  / MISH