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Saifudin T, Suliyanto S, Nurdin N, Christiano Ginzel BG, Oktavia SS, Ariyawan J, Ubadah MN. ANALYSIS OF FACTORS AFFECTING PNEUMONIA IN INDONESIAN TODDLERS USING NONPARAMETRIC REGRESSION WITH LEAST SQUARE SPLINE AND FOURIER SERIES METHODS. BAREKENG: J. Math. & App. [Internet]. 24Nov.2025 [cited 31Jan.2026];20(1):0087-104. Available from: https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/17625