MUTHAHHARAH, Sidratul; BUDIANTARA, I; RATNASARI, Vita. Modeling The Open Unemployment Rate Using A Ridge-Fourier Series Estimator In Nonparametric Regression. KUBIK: Jurnal Publikasi Ilmiah Matematika, [S. l.], v. 10, n. 2, p. 141–151, 2026. DOI: 10.15575/kubik.v10i2.55078. Disponível em: https://journal.uinsgd.ac.id/index.php/kubik/article/view/55078. Acesso em: 27 apr. 2026.