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Syahputri, Rian, Rizaldi Rizaldi, and Elly Rahayu. “Application Of Certainty Factor In Detecting Learning Concentration Disorders In Children At School”. ITEJ (Information Technology Engineering Journals) 10, no. 2 (August 25, 2025): 307 - 314. Accessed March 13, 2026. https://www.syekhnurjati.ac.id/journal/index.php/itej/article/view/277.