Bull. Korean Math. Soc. 2013; 50(6): 1841-1846
Printed November 1, 2013
https://doi.org/10.4134/BKMS.2013.50.6.1841
Copyright © The Korean Mathematical Society.
A. Najati, M. R. Abdollahpour, E. Osgooei, and M. M. Saem
University of Mohaghegh Ardabili, University of Mohaghegh Ardabili, Urmia University of Technology, University of Mohaghegh Ardabili
2007; 44(1): 73-81
2007; 44(2): 351-358
2007; 44(4): 721-729
2010; 47(3): 563-573
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