Application of ANN-GARCH on Volatility Analysis of Forecasting the Level of First Level Hospitalization Cost Claims (RITP) BPJS Health. Jurnal Varian, [S. l.], v. 8, n. 3, p. 347–362, 2025. DOI: 10.30812/varian.v8i3.5422. Disponível em: https://journal.universitasbumigora.ac.id/Varian/article/view/5422. Acesso em: 31 dec. 2025.