Ibrahim, R. and Ruchjana, B. (2023) “COVID-19 PROJECTIONS ON JAVA AND BALI ISLANDS INVOLVING VACCINATION AND TESTING INTERVENTIONS USING VARI-X MODEL”, BAREKENG: Jurnal Ilmu Matematika dan Terapan, 17(2), pp. 0837-0846. doi: 10.30598/barekengvol17iss2pp0837-0846.