Bluman, G.W & Cole, J.D <br/><br/>
Similarity methods for differential equations 
G.W. Bluman & J.D. Cole 
 - New York  Springer  1974 
 - 332 
 - Applied mathematical sciences 13 .
<br/><br/><label>ISBN: </label>3540901078 
<br/><br/><label>Dewey Class. No.: </label>10.01+10.02  / BLUM