J. Korean Math. Soc. 2004; 41(6): 1023-1034
Printed November 1, 2004
Copyright © The Korean Mathematical Society.
Yong-Kab Choi, Kyo-Shin Hwang, Hee-Jin Moon, Tae-Sung Kim, and Jong-Il Baek
Gyeongsang National University, Gyeongsang National University, Gyeongsang National University, Wonkwang University, Wonkwang University
1999; 36(4): 679-697
2005; 42(6): 1265-1278
1996; 33(4): 813-822
1999; 36(3): 509-525
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