[1] Capital Univ Sci & Technol CUST, Dept Math, Islamabad 44000, Pakistan
[2] New Valley Univ, Fac Sci, Dept Math, Al Kharga, Al Wadi Al Gadi, Egypt
[3] Northern Border Univ, Fac Sci, Dept Math, Ar Ar, Saudi Arabia
[4] Kanazawa Univ, Div Math & Phys Sci, Kakuma, Japan
[5] Univ Putra Malaysia, Inst Math Res, Serdang, Selangor, Malaysia
[6] Univ Putra Malaysia, Ctr Fdn Studies Agr Sci, Serdang, Selangor, Malaysia
[7] King Khalid Univ, Coll Sci, Dept Math, Abha, Saudi Arabia
[8] Qassim Univ, Coll Sci & Arts, Dept Math, Al Badaya, Saudi Arabia
[9] Yokohama Natl Univ, Div Mat & Chem Engn, Yokohama, Kanagawa, Japan