J. Korean Math. Soc. 1997; 34(4): 825-839
Printed December 1, 1997
Copyright © The Korean Mathematical Society.
Seok-Zun Song, Sung-Min Hong, Young-Bae Jun, Hong-Kee Kim, and Seon-Jeong Kim
Cheju National University, Gyeongsang National University, Gyeongsang National University, Gyeongsang National University and Gyeongsang National University
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