Kusmiran, Aridha Pebriani, Nur Salam, and Agus Muslim. 2026. “APPLICATION OF TRUNCATED SPLINE AND FOURIER SERIES IN MODELING THE OPEN UNEMPLOYMENT RATE IN KALIMANTAN ISLAND”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan 20 (3), 1821-36. https://doi.org/10.30598/barekengvol20iss3pp1821-1836.