Troutman, John L. <br/><br/>
Variational calculus and optimal control :  optimization with elementary convexity / 
John L. Troutman. 
 - 2nd ed. 
 - New York :  Springer-Verlag,  1995. 
 - 461 p. :  ill. ;  24 cm. 
 - Undergraduate texts in mathematics. Readings in mathematics. .
<br/><br/>p. 445-451. 
<br/><br/><label>ISBN: </label>0387945113  RM152.93 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations.<br/>Control theory.<br/>Mathematical optimization.<br/>Convex functions.