I. M. Gledhill, M.-F. Roy, M.-H. Chiu, R. Ivie, S. Ponce-Dawson, and H. Mihaljević, “A global approach to the gender gap in mathematical, computing and natural sciences: How to measure it, how to reduce it?”, S. Afr. J. Sci., vol. 115, no. 3/4, Mar. 2019.