Troutman, John L. <br/><br/>
Variational calculus with elementary convexity / 
John L. Troutman with the assistance of W. Hrusa. 
 - New York :  Springer-Verlag,  1983. 
 - 364p. ;  26 cm. 
 - Undergraduate texts in mathematics. .
<br/><br/>Includes index Bibliography: p.351-355. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations.<br/>Convex functions.