J. Korean Math. Soc. 1996; 33(4): 813-822
Printed December 1, 1996
Copyright © The Korean Mathematical Society.
Yong Kab Choi, Shin Min Kang, and Yeol Je Cho
Gyeongsang National University, Gyeongsang National University and Gyeongsang National University
1995; 32(4): 739-751
1999; 36(3): 509-525
1999; 36(4): 679-697
2001; 38(3): 577-594
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