T. W. Quadri (North-West University), L. O. Olasunkanmi (Obafemi Awolowo University, University of Johannesburg), O. E. Fayemi (North-West University), and E. E. Ebenso (University of South Africa)

M. Sabeti (Western University), J. J. Noel (University of Western Ontario), and A. Situm (Western University)

Y. Ando, D. Feenstra, S. Shankar, and J. Kish (McMaster University)