[1] Dr Babasaheb Ambedkar Marathwada Univ, Dept Math, Aurangabad, Maharashtra, India
[2] Hajjah Univ, Dept Math, Hajjah, Yemen
[3] Cankaya Univ, Dept Math, Ankara, Turkey
[4] China Med Univ, China Med Univ Hosp, Dept Med Res, Taichung, Taiwan
[5] Hodeidah Univ, Dept Math, Al Hodeidah, Yemen
[6] Prince Sultan Univ, Dept Math & Sci, Riyadh, Saudi Arabia
[7] Univ Malakand, Dept Math, Chakdara Dir Lower, Khyber Pakhtunk, Pakistan