Oktaviany, Mufty Ridne, Ani Andriyati, and Embay Rohaeti. “PEMODELAN TINGKAT PENGANGGURAN TERBUKA DI SUMATERA UTARA MENGGUNAKAN REGRESI NONPARAMETRIK SPLINE TURNCATED”. Interval : Jurnal Ilmiah Matematika 5, no. 1 (March 30, 2025): 16–26. Accessed January 12, 2026. https://interval-fmipa.unpak.ac.id/index.php/intv/article/view/13.