Sagan, Hans <br/><br/>
Introduction to the calculus of variations 

 - New York  Mc- Graw Hill Book Company       1969 
 - xvi, 449 p.  Includes bibliographical reference and index 
<br/><br/><label>Source: </label> Reference  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations<br/>Mathematical calculus <br/>Mathematics