Zienkiewicz, O.C. <br/><br/>
Finite elements and approximation / 
O.C. Zienkiewicz, K. Morgan. 
 - New York :  Wiley,  1983. 
 - xii, 328 p. :  ill. ;  23 cm. 
<br/><br/> "A Wiley-Interscience publication."  Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0471890898 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Approximation theory.<br/>Finite element method.