Commun. Korean Math. Soc. 2018; 33(4): 1123-1123
Online first article October 19, 2018 Printed October 31, 2018
https://doi.org/10.4134/CKMS.c180334
Copyright © The Korean Mathematical Society.
Mohammad Ali Bahmani, Driss Bennis, Hamid Reza Ebrahimi Vishki, Azam Erfanian Attar, Brahim Fahid
Ferdowsi University of Mashhad, Faculty of Sciences, Ferdowsi University of Mashhad, Ferdowsi University of Mashhad, B.P. 1014, Mohammed V University in Rabat
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