Marais, Johann Lodewyk. “Eugène N. Marais and the Waterberg Cycad (Encephalartos Eugene-Maraisii Verdoorn)”. Journal of Literary Studies, vol. 35, no. 4, Dec. 2019, pp. 77-95, https://unisapressjournals.co.za/index.php/jls/article/view/11543.