Winter, Petria; Rabe, Monique; Bornman, Juan; De Wet, Febe; Graham, Marien Alet; Van der Linde, Jeannie(Suid Afrikaanse Akademie vir Wetenskap en Kuns, 2023-03)
Gaigher, Estelle; Rogan, John M.; Braun, Max Willi Hermann(Southern African Association for Research in Mathematics, Science and Technology Education, 2006)