Commun. Korean Math. Soc. 2003; 18(1): 31-37
Printed March 1, 2003
Copyright © The Korean Mathematical Society.
Hwasin Park, Daeyeoul Kim, Eunhee Lee
Chonbuk National University, Chonbuk National University, Chonbuk National University
2012; 27(4): 689-699
2005; 20(3): 467-485
2009; 24(3): 341-351
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