Document Type : Original Article
Authors
1 Department of Mathematics, Faculty of Science, Urmia University, Urmia, Iran
2 Faculty of Science, Urmia University, Urmia, Iran
3 Department of Mathematics, Istanbul Bilgi University, 34060, Eski Silahtaraga Elektrik Santrali Kazim Karabekir Cad. No: 2/13 Eyupsultan, Istanbul, Turkey
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