Musta'in, Ghufron, et al. “Penyebaran Penyakit Menular Virus COVID-19 Varian Omicron Di Indonesia Dengan Model Susceptible Vaccinated Infected Recovered (SVIR)”. Jurnal Ilmiah Keperawatan, vol. 17, no. 2, Apr. 2026, pp. 110-5, https://doi.org/10.30643/jiksht.v17i2.194.