N. Wulandari, R. A. Putri, A. Nazhirah, and S. A. Novia, “Inflation Forecasting for Riau Province: A Comparison of Parametric ARIMA with Nonparametric Nadaraya-Watson Kernel Regression and B-Spline Methods”, JMSK, vol. 21, no. 3, pp. 763–774, May 2025.