B. Indar, M. N. . Huda, and S. 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 ”, JMSK, vol. 20, no. 1, pp. 196–206, Sep. 2023.