Fletcher, R. <br/><br/>
Practical methods of optimization / 
R.Fletcher 
 - Chichester :  John Wiley & Sons,  1980 
 - 2v. :  ill. ;  24 cm. 
<br/><br/> A Wiley-Interscience publication 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>LCCN: </label>80-42063 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical optimization