G. T. Ellison, R. B. Mattes, H. Rhoma, and T. de Wet, “Economic vulnerability and poor service delivery made it more difficult for shack-dwellers to comply with COVID-19 restrictions”, S. Afr. J. Sci., vol. 118, no. 5/6, May 2022, doi: 10.17159/sajs.2022/13301.