Mathabathe, Maria Ntsoaki; Bolokang, A.S.; Govender, G.; Siyasiya, Charles Witness; Mostert, Roelf Johannes(Southern African Institute of Mining and Metallurgy, 2021-04)
Khanyema, Simphiwe; Annan, Kofi Ahomkah; Mostert, Roelf Johannes; Siyasiya, Charles Witness; Moema, Joseph(Suid-Afrikaanse Akademie vir Wetenskap en Kuns, 2021)