Infinite dimensional Morse theory and multiple solution problems  
Chang, Kung-chʻing. 
 - Boston :  Birkhäuser,  1993 
 - x, 312 p. :  ill. ;  25 cm. 
 - Progress in nonlinear differential equations and their applications ;  v. 6 .
<br/><br/><label>ISBN: </label>817634517