Moiseiwitsch, B. L. <br/><br/>
Variational principles 

 - Mineola, N.Y. :  Dover Publications,  ©2004. 
 - x, 310 p. :  ill. (b&w) ;  21.5 cm (Paperback) 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>9780486438177 
<br/><br/><label>Subjects--Index Terms: </label>Mathematical physics. Variational principles Calculus of variations 
<br/><br/><label>Dewey Class. No.: </label>530.15  / MOI / G