Hydon, Peter E. <br/><br/>
Symmetry methods for differential equations: Beginner's guide 
by Peter E Hydon 
 - Cambridge  Cambridge University Press  2000 
 - xi, 213p. 
 - Cambridge texts in applies mathematics   .
<br/><br/><label>ISBN: </label>9780521497862 
<br/><br/><label>Dewey Class. No.: </label>530.15535  / P;1 (AE)