1. Department of Physics and Engineering Mathematics, Higher Institute of Engineering
2. Department of Mathematics and Physics, Grambling State University
3. Department of Computer Engineering, Biruni University
4. Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, Dunarea de Jos University of Galati
5. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University
6. Department of Mathematics and Statistics, Tshwane University of Technology
7. Department of Mathematics, King Abdulaziz University