1. Department of Mathematics, Centre for Research and Development , KPR Institute of Engineering and Technology , Coimbatore , Tamilnadu , India
2. Department of Mathematics , K.S.Rangasamy College of Technology , Tiruchengode , Namakkal , Tamilnadu , India
3. Department of Mathematics and General Sciences , Prince Sultan University , P.O.Box 66833 , Riyadh , Saudi Arabia
4. Department of Medical Research , China Medical University , Taichung 40402 , Taiwan
5. Department of Mathematics, College of Arts and Sciences , Prince Sattam bin Abdulaziz University , Wadi Aldawaser 11991 , Saudi Arabia