Author/Authors :
Safari Sabet، Sh A نويسنده Department of Mathematics, Islamic Azad University, Central Tehran Branch, PO. Code 14168-94351, Iran , , Farmani، M نويسنده Department of Mathematics, Islamic Azad University, Central Tehran Branch, PO. Code 14168-94351, Iran , , Khormali، O نويسنده Mathematics and Informatics Research Group, ACECR, Tarbiat Modares University, P. O. Box: 14115-343, Tehran, Iran , , Mahmiani، A نويسنده Department of Mathematics, Payame Noor University, 19395-4797, Tehran, Iran , , Bagheri، Z نويسنده Islamic Azad University Branch of Azadshaher, Azadshaher, Iran ,
