[Khan, M. Ijaz] Riphah Int Univ, Dept Math, Faisalabad Campus, Faisalabad 38000, Pakistan.
[Kadry, Seifedine] Beirut Arab Univ, Dept Math & Comp Sci, Beirut, Lebanon.
[Chu, Yuming] Huzhou Univ, Dept Math, Huzhou 313000, Peoples R China.
[Chu, Yuming] Changsha Univ Sci & Technol, Hunan Prov Key Lab Math Modeling & Anal Engn, Changsha 410114, Peoples R China.
[Waqas, M.] Natl Univ Technol, NUTECH Sch Appl Sci & Humanities, Islamabad 44000, Pakistan.