| 作者: | | M. Zerafat Angiz L. | Department of Mathematics, Islamic, Azad University, Firooz-Kooh, Iran and School of Mathematical Sciences, Universiti Sains Malaysia, Penang Malaysia | | A. Emrouznejad | Aston Business School, Aston University, Birmingham B4 7ET, UK | | A. Mustafa | School of Mathematical Sciences, Universiti Sains Malaysia, Penang Malaysia | | A. Rashidi Komijan | Department of Mathematics, Islamic, Azad University, Firooz-Kooh, Iran |
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