Morse theory, Minimax theory and their application to non-linear differential equations   
ed by Haim Brezis., et al 
 - Somerville  International Press  2003 
 - iv, 282p 
 - New studies in advanced Mathematics .
<br/><br/><label>ISBN: </label>1571461094 
<br/><br/><label>Dewey Class. No.: </label>621.38220151535  / P03