Author/Authors :
Alikhani ، Saeid Department of Mathematical Sciences - Yazd University , Pourbabaee ، Marzieh Department of Applied Mathematics - Faculty of Mathematical Sciences - University of Kashan , Ghorbani ، Modjtaba Department of Mathematics - Faculty of Science - Shahid Rajaee Teacher Training University , Saadatmandi ، Abbas Department of Applied Mathematics - Faculty of Mathematical Sciences - University of Kashan
