Bluman, George W., <br/><br/>
Symmetries and  differential equations / 
George W. Bluman, S. Kumei 
 - New York :  Springer,  1989 
 - xii, 412 p. :  ill. ; 
 - Applied mathematical sciences ;  v. 154 .
<br/><br/><label>Subjects--Index Terms: </label>Differential equations 
<br/><br/><label>Universal Decimal Class. No.: </label>519.62  / BLU