Na’malia, Sakinun, Faisol Faisol, and Tony Yulianto. “Modeling the Spread of Hepatitis B Disease from the SEIR Model in East Java Using RKF 45”. Tensor: Pure and Applied Mathematics Journal 6, no. 1 (September 8, 2025): 1-12. Accessed October 25, 2025. https://ojs3.unpatti.ac.id/index.php/tensor/article/view/19042.