Troutman, J.L <br/><br/>
Variational calculus & optimal control  optimization with elementary convexity 
J.L. Troutman 
 - 2 
 - New York  Springer  1996 
 - xv  461 
 - Undergraduate texts in mathematics .
<br/><br/><label>ISBN: </label>0-387-94511-3 
<br/><br/><label>Dewey Class. No.: </label>4.13+15.04  / TROU