[1] Nanjing Univ, Sch Management Sci & Engn, Nanjing 210093, Peoples R China
[2] Ibn Zohr Univ, ENSA, Agadir, Morocco
[3] COMSATS Inst Informat Technol, Dept Math, Islamabad, Pakistan
[4] King Saud Univ, Coll Sci, Dept Math, Riyadh 11451, Saudi Arabia
[5] Mohamed 5 Univ Sci, Ecole Super Technol Sale, Rabat, Morocco