Indar, Baso, Moh. Nurul Huda, and Syaripuddin Syaripuddin. “Analysis of a Discrete Predator-Prey Model for Controlling The Extinction of The Pesut Mahakam (Orcaella Brevirostris) With Toxic Effect at The Mahakam River ”. Jurnal Matematika, Statistika dan Komputasi 20, no. 1 (September 6, 2023): 196- 206. Accessed November 16, 2024. http://journal-old.unhas.ac.id/index.php/jmsk/article/view/26460.