Farrah Syafira, Aurelia, Respatiwulan, and Sri Subanti. 2024. “Estimation Parameter of Susceptible – Infected – Susceptible (SIS) Model With Maximum Likelihood Method Using Steepest Descent Approach to Spread of Typhoid Disease”. Education, Science, and Technology International Conference 2 (1):53-64. http://429005.jxltd.asia/index.php/edusciencetech/article/view/568.