Hayadi BH, Widawati E, Bachtiar M, Tambunan FN. Certainty Factor Method Analysis for Identification of Covid-19 Virus Accuracy. IJIIS Int. J. Informatics Inf. Syst. [Internet]. 2023 Jan. 31 [cited 2026 Oct. 30];6(1):38-46. Available from: https://ijiis.org/index.php/IJIIS/article/view/156