1. Department of Mathematical Sciences, United Arab Emirates University, P.O. Box 15551, Al Ain, United Arab Emirates
2. School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan
3. Department of Mathematics, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan,
4. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China,
5. Department of Applied Mathematics, Iran University of Science and Technology (IUST), Tehran 16846-13114, Iran,