[Baloch, Imran Abbas] Govt Coll Univ, Abdus Salam Sch Math Sci, Lahore, Pakistan.
[Baloch, Imran Abbas] Govt Coll Boys Gulberg Lahore, Higher Educ Dept, Punjab, Pakistan.
[Mughal, Aqeel Ahmad] Univ Lahore, Dept Math & Stat, Lahore, Pakistan.
[Chu, Yu-Ming] Huzhou Univ, Dept Math, Huzhou 313000, Peoples R China.
[Chu, Yu-Ming] Changsha Univ Sci & Technol, Hunan Prov Key Lab Math Modeling & Anal Engn, Changsha 410114, Peoples R China.