“Analysis of a Discrete Predator-Prey Model for Controlling The Extinction of The Pesut Mahakam (Orcaella brevirostris) with Toxic Effect at The Mahakam River ” (2023) Jurnal Matematika, Statistika dan Komputasi, 20(1), pp. 196–206. doi:10.20956/j.v20i1.26460.