Commun. Korean Math. Soc. 2017; 32(1): 55-64
Online first article January 11, 2017 Printed January 31, 2017
https://doi.org/10.4134/CKMS.c160026
Copyright © The Korean Mathematical Society.
Shayesteh Rezaei
Aligoudarz Branch, Islamic Azad University
2015; 30(3): 169-176
2014; 29(3): 409-413
2003; 18(4): 653-659
2005; 20(4): 703-708
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