Fitriyah AT, Chamidah N, Saifudin T, Lestari B, Aydin D. Least Squares Spline Estimation Method in Semiparametric Time Series Regression for Predicting Indonesia Composite Index. Stat., optim. inf. comput. [Internet]. 2025Oct.14 [cited 2025Dec.5];14(6):3776-803. Available from: http://www.iapress.org/index.php/soic/article/view/2704