[1] King Khalid Univ, Coll Sci, Dept Math, Abha, Saudi Arabia
[2] Inst Southern Punjab, Dept Math, Multan, Pakistan
[3] Univ Engn & Technol, UET, Nat Sci & Humanities Dept, New Campus, Lahore, Pakistan
[4] Muhammad Nawaz Sharif Univ Engn & Technol, Dept Basic Sci & Humanities, Multan 60000, Pakistan
[5] Bahauddin Zakariya Univ, Ctr Adv Studies Pure & Appl Math, Multan 60800, Pakistan
[6] Capital Univ Sci & Technol CUST, Dept Math, Islamabad 44000, Pakistan
[7] New Valley Univ, Fac Sci, Dept Math, Al Kharga 72511, Al Wadi Al Gadi, Egypt
[8] Northern Border Univ, Coll Business Adm, Finance & Insurance Dept, Ar Ar 1321, Saudi Arabia
[9] Qassim Univ, Coll Sci & Arts, Dept Math, Alasyah 51971, Saudi Arabia
[10] Helwan Univ, Fac Sci, Dept Math, Cairo, Egypt
[11] Future Univ Egypt, Fac Engn, Ctr Res, New Cairo 11835, Egypt