Aloysius, Nikolaus, Manahan Siallagan, and Chao Ou-Yang. “Laboratory Performance Modeling Using Petri Nets in National Standardization Agency in Indonesia”. International Journal of Management, Entrepreneurship, Social Science and Humanities 5, no. 1 (June 30, 2022): 194–207. Accessed October 18, 2024. https://journals.researchsynergypress.com/index.php/ijmesh/article/view/985.