Primer on the calculus of variations and optimal control theory 
Mesterton-Gibbons, Mike. 
 - Providence, R.I. :  American Mathematical Society,  2009 
 - xiii, 252 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>9780821847725 (alk. paper) | 9780821887349 (paper cover;