Author/Authors :
Sedghi, Sh. Department of Mathematics - Islamic Azad University, Qaemshahr Branch , Gholidahneh, A. Department of Mathematics - Islamic Azad University, Qaemshahr Branch , Esfahani, J. Department of Mathematics - Islamic Azad University, Qaemshahr Branch , Dosenovic, T. Faculty of Technology - University of Novi Sad, Serbia , Radenovic, S. Faculty of Mechanical Engineering - University of Belgrade, Serbia