PARWATI, Lusiana Sani; NUGRAHANI, Endar Hasafah; BUDIARTI, Retno. Forecasting Stock Price Using Armax-Garchx Model During The Covid-19 Pandemic. Mathline : Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 8, n. 2, p. 489–502, 2023. DOI: 10.31943/mathline.v8i2.413. Disponível em: https://mathline.unwir.ac.id/index.php/Mathline/article/view/413. Acesso em: 24 dec. 2025.