1. Department of Mathematics & Statistics, Bacha Khan University Charsadda, Khyber Pakhtunkhwa, Pakistan
2. Department of Mathematics, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan
3. Department of Mathematics & Statistics, Riphah International University, Hajj Complex I-14 Islamabad, Pakistan
4. Department of Mathematics, Faculty of Science, University of Gaziosmanpasa, Tokat, Turkey
5. Department of Mathematics, University of Seoul, Seoul, Republic of Korea
6. Research Institute of Natural Sciences, Hanyang University, Seoul, Republic of Korea