Duistermaat, Johannes J. <br/><br/>
Discrete integrable systems:  QRT maps and elliptic surfaces 
Johannes J. Duistermaat. 
 - New York :  Springer,  2010. 
 - xxii, 627p. 
<br/><br/><label>ISBN: </label>9781441971166 
<br/><br/><label>Subjects--Index Terms: </label>Algebraic geometry 
<br/><br/><label>Universal Decimal Class. No.: </label>512.7  / DUI