Arisetyawan, Andika, and Supriadi Supriadi. “Ethnomathematics Study in Calendar System of Baduy Tribe”. Ethnomathematics Journal 1, no. 1 (May 4, 2020): 25–29. Accessed June 10, 2025. https://jurnal.uny.ac.id/index.php/ethnomath/article/view/28013.