I. Istiadi, Emma Budi Sulistiarini, Rudy Joegijantoro, Anik Vega Vitianingsih, and Affi Nizar Suksmawati, “Mamdani Fuzzy Expert System for Online Learning to Diagnose Infectious Diseases”, J. RESTI (Rekayasa Sist. Teknol. Inf.) , vol. 6, no. 6, pp. 1047 - 1056, Dec. 2022.