Hutasuhut, Masyuni, et al. “Analisis Aritmia (Gangguan Irama Jantung) Menerapkan Metode Certainty Factor”. JURNAL MEDIA INFORMATIKA BUDIDARMA, vol. 5, no. 4, Oct. 2021, pp. 1386-93, doi:10.30865/mib.v5i4.3289.