Document Type : Article
Authors
^{1} Department of Mathematics, Qazvin Branch, Islamic Azad University, Qazvin, Iran
^{2} Department of Mathematics, Rasht Branch, Islamic Azad University, Gilan, Iran
^{3} Department of Mathematics, Science and Research, Islamic Azad University, Tehran, Iran
^{4} Faculty of Business, Sohar University, Sohar, Oman
Abstract
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