1. School of Control and Computer Engineering, North China Electric Power University, Beijing, China
2. Department of Mathematics and Statistics, Jordan University of Science and Technology, Irbid, Jordan
3. Department of Mathematics, University of Science and Technology Bannu, Pakistan
4. Department of Humanities and Basic Sciences, MCS, National University of Sciences and Technology, Islamabad, Pakistan
5. School of Mathematics and Physics, North China Electric Power University, Beijing, China
6. MIFT-Dipartimento di Scienze Matematiche e Informatiche, scienze Fisiche e scienze della Terra, Messina University, Messina, Italy