Rio, F., Michael, R. Charlitos, Sudiono, dan S. Thang. “ANALISA PREDIKSI ANGKA KESEMBUHAN COVID-19 PADA BULAN APRIL 2021”. Journal of Digital Ecosystem for Natural Sustainability, vol. 1, no. 1, Juli 2021, hlm. 25-28, https://journal.uvers.ac.id/index.php/jodens/article/view/22.