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Z. Ayati
Department of Engineering sciences, Faculty of Technology and Engineering East of Guilan, University of Guilan, P.C. 44891-63157, Rudsar-Vajargah, Iran
J. Biazar
Department of Applied Mathematics Faculty of Mathematical Science, University of Guilan, , P.O. Box 41635-19141, P.C. 4193833697, Rasht, Iran
M. Partovi
Department of Applied Mathematics Faculty of Mathematical Science, University of Guilan , P.O. Box 41635-19141, P.C. 4193833697, Rasht, Iran