1. College of Engineering, Mechanics and Materials, Hohai University, Nanjing, People’s Republic of China
2. Department of Mathematics, Shaheed Benazir Bhutto University, Khyber Pakhtunkhwa, Pakistan
3. Department of Mathematics, Faculty of Sciences, Van Yuzuncu Yil University, Van, Turkey
4. College of Science, Mathematics, Hohai University, Nanjing, People’s Republic of China
5. College of Computer Science and Information Technology, Hohai University, Nanjing, People’s Republic of China
6. Department of Mathematics, University of Peshawar, Khyber Pakhtunkhwa, Pakistan