[1] Jiangsu Univ, Dept Math, Fac Sci, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Obour Inst, Dept Math, Cairo, Egypt
[3] Prince Sattam bin Abdulaziz Univ, Dept Math, Coll Arts & Sci, Wadi Aldawaser, Saudi Arabia
[4] Taif Univ, Dept Math, Fac Sci, At Taif, Saudi Arabia
[5] Al Azher Univ, Dept Math, Fac Sci, Cairo, Egypt