“Application of ANN-GARCH on Volatility Analysis of Forecasting the Level of First Level Hospitalization Cost Claims (RITP) BPJS Health”. Jurnal Varian 8, no. 3 (October 31, 2025): 347–362. Accessed December 31, 2025. https://journal.universitasbumigora.ac.id/Varian/article/view/5422.