Hackbusch, W <br/><br/>
Multi-grid methods & applications 
W. Hackbusch 
 - Berlin  Springer  1985 
 - xiv  377 
 - Springer series in computational mathematics 4 .
<br/><br/><label>ISBN: </label>3540127615 
<br/><br/><label>Dewey Class. No.: </label>11.11  / HACK