1. Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam
2. Department of Mathematics, COMSATS University Islamabad, Sahiwal, Pakistan
3. Department of Mathematics, Huzhou University, Huzhou, China + Hunan Provincial Key Laboratory of Mathematical Modelling and Analysis in Engineering, Changsha University of Science and Technology, Changsha, China
4. Department of Mathematics and Statistics, Jordan University of Science and Technology, Irbid, Jordan
5. Department of Mathematics, College of Arts and Sciences, Prince Sattam binAbdulaziz University, Wadi Aldawaser, Saudi Arabia