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Authors: |
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Jafar Biazar - Department of Applied Mathematics, Faculty of Mathematical sciences University of Guilan, P.O.Box. 41635-19141, P.C.41938336997, Rasht, Iran.
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Roya Montazeri - Department of Applied Mathematics, University Campus2 University of Guilan, Rasht, Iran.\\ Department of Mathematics, Payame Noor University, P. O. Box 19395-3697, Tehran, Iran.
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