P. Ntombela, Q. Qwabe, M. Mashigo, S. Chiliza, L. Nhlapo, and W. Ndou, “Orthopaedic injuries In South African ‘zama-zama’ gold miners: The Johannesburg West Rand experience with illegal gold mining”, E Af Orth Jnl, vol. 20, no. 1, pp. 30–35, Jun. 2026.