An Invariant of the Projective Sem-i symmetric Connection 
ZHAO Pe-i biao, SONG Hong-zao
Chinese Quarterly Journal of Mathematics . 2001, (4): 49 -54 . 

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.