Bahtiar, A. Rifqi, Muchammad Abrori, and Malahayati Malahayati. “Konsep Dasar Ruang Metrik Cone”. Jurnal Fourier 3, no. 2 (October 3, 2014): 115–129. Accessed December 14, 2025. https://www.fourier.or.id/index.php/FOURIER/article/view/45.