“The Robust Negative Binomial Regression Model on Under-Five Mortality Due to Pneumonia in the Province of East Java”. Jurnal Matematika, Statistika dan Komputasi 21, no. 1 (September 15, 2024): 176–189. Accessed August 7, 2026. https://journal-598.unhas.ac.id/index.php/jmsk/article/view/34512.