Bluman, G.W & Anco, S.C <br/><br/>
Symmetry & integration methods for differential equations 
G.W Bluman & S.C. Anco 
 - New York  Springer  2002 
 - x  419 
 - Applied mathematical sciences 154 .
<br/><br/><label>ISBN: </label>0-387-98654-5 
<br/><br/><label>Dewey Class. No.: </label>10.13+11.07+9.02  / BLUM