Krasil'shchik, I.S. <br/><br/>
Symmetries and recursion operators for classical and supersymmetric differential equations   
by I.S.Krasil'shchik, P.H.M.Kersten 
 - Dordrecht  Kluwer Academic Publishers  2000 
 - xvi, 384p. 
 - Mathematics and its applications  507 .
<br/><br/><label>ISBN: </label>0792363159 
<br/><br/><label>Dewey Class. No.: </label>515.35  / P