Bull. Korean Math. Soc. 2018; 55(2): 675-677
Online first article March 8, 2018 Printed March 30, 2018
https://doi.org/10.4134/BKMS.b170714
Copyright © The Korean Mathematical Society.
Nam Kyun Kim, Tai Keun Kwak, Yang Lee
Hanbat National University, Daejin University, Daejin University
2016; 53(3): 925-942
2022; 59(3): 529-545
2023; 60(5): 1321-1334
2019; 56(5): 1257-1272
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