Troutman, John L. <br/><br/>
Variational calculus with elementary convexity / 
John L. Troutman. 
 - New York :  Springer-Verlag,  1983. 
 - ix, 364 p. ;  24 cm. 
 - Undergraduate texts in mathematics .
<br/><br/>Includes index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0387907718 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations.<br/>Convex functions.