Estimating and Forecasting Composite Index in Pandemic Era Using ARIMA-GARCH Model. Jurnal Varian, [S. l.], v. 7, n. 2, p. 115–124, 2024. DOI: 10.30812/varian.v7i2.2103. Disponível em: https://journal.universitasbumigora.ac.id/Varian/article/view/2103. Acesso em: 27 mar. 2026.