Rosa Salsabila Azarine, Septrina Kiki Arisandi, Fadhilah Fitri, and Yenni Kurniawati, “Comparison of Kernel and Spline Nonparametric Regression (Case Study: Food Security Index of Jambi Province 2023)”, ujsds, vol. 3, no. 3, pp. 315–323, Aug. 2025.