MULTIYANINGRUM, Riska; AMRI, Ihsan Fathoni; HARIS, M. Al; SALSABILLA, Havinka Angel; GINASPUTRI, Heppy Nur Asavia; SINTYA, Salsabila Dhea. Forecasting the Volatility of Tuna Fish Prices in North Sumatra using the ARCH Method in the Period January - April 2024. EIGEN MATHEMATICS JOURNAL, [S. l.], v. 7, n. 2, p. 93–101, 2024. DOI: 10.29303/emj.v7i2.236. Disponível em: http://eigen.unram.ac.id/index.php/eigen/article/view/236. Acesso em: 21 jul. 2026.