Izzah, A., R. Widyastuti, and Z. Khalida. “Classification of Restrictions on Community Activities Level in the Covid-19 Pandemic Using Fuzzy Logic”. Jurnal Teknik Informatika C.I.T Medicom, vol. 15, no. 2, June 2023, pp. 108-17, doi:10.35335/cit.Vol15.2023.454.pp108-117.