[1] Jazan Univ, Dept Math, Fac Sci, Jazan, Saudi Arabia
[2] Sohag Univ, Dept Math, Fac Sci, Sohag, Egypt
[3] Univ Roma La Sapienza, Dipartimento Ingn Meccan & Aerospaziale, Rome, Italy
[4] Univ Aquila, Int Res Ctr Math & Mech Complex Syst M&MOCS, I-67100 Laquila, Italy
[5] Univ Paris 13, LSPM, Paris, France