Van Schalkwyk, Heléne, Linke Potgieter, と Cang Hui. 2017. 「The development of a spatio-temporal model for water hyacinth biological control strategies」. Mathematical and Computational Forestry & Natural-Resource Sciences (MCFNS) 9 (1): 30-42 (13). https://mcfns.com/index.php/Journal/article/view/9.4.