Singer, Michael F. <br/><br/>
Galois theory of difference equations 

 - New York  Springer  1997 
 - vii,178p.  PB  22cm. 
 - Lecture Notes in Mathamatics .
<br/><br/><label>ISBN: </label>9783540632436 
<br/><br/><label>Dewey Class. No.: </label>512.32  / PUT