Devianto, Dodi, Sarah Sarah, Siska Dwi Kumala, and Maiyastri Maiyastri. “The Characteristic Function Property of Mixture Negative Binomial-Exponential Distribution”. Science and Technology Indonesia 3, no. 4 (October 26, 2018): 178–182. Accessed January 16, 2025. https://sciencetechindonesia.com/index.php/jsti/article/view/109.