(1)
Saifudin, T.; Suliyanto, S.; Nurdin, N.; Christiano Ginzel, B. G.; Oktavia, S. S.; Ariyawan, J.; Ubadah, M. N. ANALYSIS OF FACTORS AFFECTING PNEUMONIA IN INDONESIAN TODDLERS USING NONPARAMETRIC REGRESSION WITH LEAST SQUARE SPLINE AND FOURIER SERIES METHODS. BAREKENG: J. Math. & App. 2025, 20, 0087-0104.