L. M. Davids, J. van Wyk, N. P. Khumalo, and N. G. Jablonski, “The phenomenon of skin lightening: Is it right to be light?”, S. Afr. J. Sci., vol. 112, no. 11/12, p. 5, Nov. 2016, doi: 10.17159/sajs.2016/20160056.