Fitriyah, A. T., Chamidah, N., Saifudin, T., Lestari, B. and Aydin, D. (2025) “Least Squares Spline Estimation Method in Semiparametric Time Series Regression for Predicting Indonesia Composite Index”, Statistics, Optimization & Information Computing. doi: 10.19139/soic-2310-5070-2704.