J. Korean Math. Soc. 1996; 33(4): 801-811
Printed December 1, 1996
Copyright © The Korean Mathematical Society.
Tae-Sung Kim and Hye-Young Seo
Won-Kwang University and Won-Kwang University
1995; 32(2): 321-328
1998; 35(3): 793-802
2012; 49(2): 223-233
© 2022. The Korean Mathematical Society. Powered by INFOrang Co., Ltd