1. Theoretical Physics Group, Department of Physics, University of Calabar, Calabar, Nigeria
2. Theoretical Physics Group, Department of Physics, University of Uyo, Uyo, Nigeria
3. Department of Physics, National Open University of Nigeria, Jabi, Abuja, Nigeria
4. Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
5. Alex Ekwueme Federal University Ndufu-Alike, Abakaliki, Ebonyi State, Nigeria
6. Physics Department, Kogi State University, Anyigba, Nigeria
7. Department of Physical Sciences, University of Agriculture and Environmental Sciences, Umuagwo, Imo State, Nigeria
8. Department of Physics, Akwa Ibom State University, Ikot Akpaden, Uyo, Nigeria
9. Department of Mathematics, Instituto Federal do Sudeste de Mina Gerais, Juiz de Fora, Brazil
10. Theoretical Physics Group, Department of Physics, University of Port Harcourt, Port Harcourt, Nigeria