Pasarella, M., Sifriyani, S., & Amijaya, F. (2022). NONPARAMETRIK REGRESSION MODEL ESTIMATION WITH THE FOURIER SERIES THE FOURIER SERIES APPROACH AND ITS APPLICATION TO THE ACCUMULATIVE COVID-19 DATA IN INDONESIA. BAREKENG: Jurnal Ilmu Matematika Dan Terapan, 16(4), 1167-1174. https://doi.org/10.30598/barekengvol16iss4pp1167-1174