Variational methods in mathematics,science and engineering 

 - Boston  D.Reidel Publishing Company  1977 
 - 571p.  26cm. 
<br/><br/><label>ISBN: </label>9027704880 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Calculus of variations
<br/><br/><label>Dewey Class. No.: </label>574.8761  / R89G