Kristály, Alexandru. <br/><br/>
Variational principles in mathematical physics, geometry, and economics:  qualitative analysis of nonlinear equations and unilateral problems/ 
Alexandru Kristaly, Vicentiu Radulescu, Csaba Gyorgy Varga. 
 - Cambridge, UK;  New York:  Cambridge University Press,  2010. 
 - xv, 368 p.;  24 cm. 
 - Encyclopedia of mathematics and its applications;  136 .
 - Encyclopedia of mathematics and its applications;  v. 136. .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780521117821 (hardback) 0521117828 (hardback) 
<br/><br/><label>LCCN: </label>2010024384 
<br/><br/><label>Nat. Bib. No.: </label>GBB067221  bnb 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations.
<br/><br/><label>Dewey Class. No.: </label>515.64  / K92v