پديدآورندگان :
S. M. Jafarian Amiri sm_jafarian@znu.ac.ir
Department of Mathematics, Faculty of Sciences, University of Zanjan, P.O.Box 45371-38791,
Zanjan, Iran; , H. Rostami h.rostami5991@gmail.com
Department of Mathematics, Faculty of Sciences, University of Zanjan, P.O.Box 45371-38791,
Zanjan, Iran; , P. Feizmandian parisa.feiz@yahoo.com Department of Mathematics, Faculty of Sciences, University of Zanjan, P.O.Box 45371-38791,
Zanjan, Iran;