Fitriyah, Any Tsalasatul, Nur Chamidah, Toha Saifudin, Budi Lestari, and Dursun Aydin. “Least Squares Spline Estimation Method in Semiparametric Time Series Regression for Predicting Indonesia Composite Index”. Statistics, Optimization & Information Computing (October 14, 2025). Accessed November 3, 2025. http://47.88.85.238/index.php/soic/article/view/2704.