Amrullah, M Najib, and Siti Hariksa Amalia. 2022. “COMPARISON OF GENERALIZED CROSS VALIDATION (GCV) METHODS WITH CROSS VALIDATION (CV) TO DETERMINE OPTIMAL KNOTS IN FOURIER SERIES NONPARAMETRIC REGRESSION (Case Study: Poverty Rate in North Sumatra Province)”. Jurnal Litbang Edusaintech 3 (1):1-10. https://doi.org/10.51402/jle.v3i1.5.