Generalized Lusternik-Schnirelmann Theorem 
LIU Yu-hong , FU Jun
Chinese Quarterly Journal of Mathematics . 2002, (3): 84 -87 . 

Copyright © Chinese Quarterly Journal of Mathematics, All Rights Reserved.
Tel: 0371-23881698　E-mail: sxjk@henu.edu.cn　QQ: 2454327236
Powered by Beijing Magtech Co., Ltd.