Commun. Korean Math. Soc. 2018; 33(3): 799-808
Online first article July 18, 2018 Printed July 31, 2018
https://doi.org/10.4134/CKMS.c170241
Copyright © The Korean Mathematical Society.
Indrajit Lahiri, Bipul Pal
University of Kalyani, University of Kalyani
2019; 34(2): 439-449
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