M. Irfan, P. Alkautsar, A. R. Atmadja, and Wildan Budiawan Zulfikar, “Diagnosis of Asthma Disease and The Levels using Forward Chaining and Certainty Factor”, J. RESTI (Rekayasa Sist. Teknol. Inf.) , vol. 6, no. 5, pp. 761–767, Oct. 2022, doi: 10.29207/resti.v6i5.4123.