Sugiarni, Rani, et al. “Integrating Sundanese Culture and Digital Technology: Designing an Ethnomathematics Based Worksheet Using GeoGebra for Conic Sections”. PRISMA, vol. 15, no. 1, June 2026, pp. 162-75, https://jurnal.unsur.ac.id/index.php/prisma/article/view/6168.