Encyclopaedia of Mathematical Sciences <br/><br/>
Partial differential equations IV  microlocal analysis and hyperbolic equations 
Ed. by Yu. V. Egorov and M. A. Shubin 
 - Berlin  Springer-Verlag  1993 
 - 241p. Bibl. Index. 
 - Encyclopaedia of Mathematical Sciences   V. 33 .
<br/><br/>  
<br/><br/><label>ISBN: </label>354053363X 
<br/><br/><label>Dewey Class. No.: </label>510.3  / En56.33