Ernestasia, Esther Nababan, and Asima Manurung. “Randomness of Poisson Distributed Random Number in the Queue System”. Data Science: Journal of Computing and Applied Informatics 3, no. 2 (July 31, 2019): 104–119. Accessed September 8, 2025. https://idjpcr.usu.ac.id/JoCAI/article/view/1128.