Williams, H. Paul <br/><br/>
Model building in mathematical programming   
by H. Paul Williams 
 - 4th ed. 
 - Chichester  John Wiley & Sons  1999 
 - x, 354p. 
<br/><br/><label>ISBN: </label>0471997889 
<br/><br/><label>Dewey Class. No.: </label>519.7  / N991