Bull. Korean Math. Soc. 1999; 36(1): 131-138
Printed March 1, 1999
Copyright © The Korean Mathematical Society.
Seok-Zun Song, Sung-Min Hong, Young-Bae Jun, and Seon-Jeong Kim
Cheju National University, Gyeongsang National University, Gyeongsang National University, Gyeongsang National University
2008; 45(2): 355-363
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