Stols, Gerrit Hendrikus; Ferreira, Ronel; Pelser, A.; Olivier, W.A.; Van der Merwe, Adele; De Villiers, Charl Johannes; Venter, S.N. (Stephanus Nicolaas)(Education Association of South Africa, 2015-11)
Stols, Gerrit Hendrikus; Kriek, Jeanne; Ogbonnaya, Ugorji Iheanachor(Southern African Association for Research in Mathematics, Science and Technology Education, 2008)
Da Costa, Melissa A.; Kruger, Esedra; Kritzinger, Alta M. (Aletta Margaretha); Graham, Marien Alet(African Online Scientific Information Systems, 2019-11)
Engelbrecht, Johann; Harding, Ansie; Potgieter, Marietjie(Southern African Association for Research in Mathematics, Science and Technology Education, 2014)
Tsanwani, Avhasei Richard; Harding, Ansie; Engelbrecht, Johann; Maree, J.G. (Kobus)(Southern African Association for Research in Mathematics, Science and Technology Education, 2014)