P. Yolanda and S. S. B. . Ginting, “ETHNOMATHEMATICS: COCONUT SHELL CHARCOAL PRODUCTION PROCESS IN POND VILLAGE AND ITS IMPLEMENTATION IN MATHEMATICS LEARNING: ETNOMATEMATIKA: PROSES PRODUKSI ARANG BATOK KELAPA DI KAMPUNG KOLAM DAN IMPLEMENTASINYA DALAM PEMBELAJARAN MATEMATIKA”, MaPan, vol. 11, no. 1, pp. 89–102, Jun. 2023.