Bull. Korean Math. Soc. 2013; 50(3): 833-837
Printed May 31, 2013
https://doi.org/10.4134/BKMS.2013.50.3.833
Copyright © The Korean Mathematical Society.
Bing-Ye Wu
Minjiang University
2019; 56(4): 841-852
2009; 46(1): 61-66
2019; 56(1): 201-217
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