PANE, R.; SUTARMAN; ANDI TENRI AMPA. Estimation of Heteroskedasticity Semiparametric Regression Curve Using Fourier Series Approach. Journal of Research in Mathematics Trends and Technology, [S. l.], v. 2, n. 1, p. 14–20, 2020. DOI: 10.32734/jormtt.v2i1.3744. Disponível em: https://talenta.usu.ac.id/jormtt/article/view/3744. Acesso em: 26 aug. 2025.