J. Korean Math. Soc. 2011; 48(6): 1327-1328
Printed November 1, 2011
https://doi.org/10.4134/JKMS.2011.48.6.1327
Copyright © The Korean Mathematical Society.
Absos Ali Shaikh, Young Ho Kim, and Shyamal Kumar Hui
University of Burdwan, Kyungpook National University, University of Burdwan
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