Dewi, T., and R. Kusumawati. “AN ORDINAL LOGISTIC REGRESSION MODEL FOR ANALYZING RISK ZONE STATUS OF COVID-19 SPREAD”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan, Vol. 16, no. 3, Sept. 2022, pp. 853-60, doi:10.30598/barekengvol16iss3pp853-860.