DUFF, I.S , REID, V.K , ERISMAN, A.M <br/><br/>
DISCREAT METHDS FOR SPARSE MATRICES 

 - OXFORD  CLARENDON  1986 
 - 341P 
<br/><br/><label>ISBN: </label>0-19-853408-6 
<br/><br/><label>Dewey Class. No.: </label>512.9434 DUF'D