Astuti, D. ., D. Y. . hartanti, S. T. . . Nurhayanti, and H. . Fransiska. “Clustering and Forecasting of Covid-19 Data in Indonesia”. Jurnal Matematika, Statistika Dan Komputasi, vol. 18, no. 3, May 2022, pp. 324-35, doi:10.20956/j.v18i3.18882.