Juliansyah J. Expert System Diagnosing Escherichia Coli (E-Coli) Bacteria in Refill Drinking Water with Certainty Factor Method. ijobas [Internet]. 2021 Jun. 30 [cited 2026 May 26];10(1):24-7. Available from: https://ijobas.pelnus.ac.id/index.php/ijobas/article/view/5