AMELIA, Dita; BUDIJONO, Gabriella Agnes; GHASANI, Anisah Nabilah; TAGAWA, Dustin Nathanael; AFLAHA, Nabila Shafa. Modeling ASEAN Tourist Visits to Indonesia Using Nonparametric Regression with Penalized Spline Estimator. Zeta - Math Journal, [S. l.], v. 10, n. 2, p. 113–122, 2026. DOI: 10.31102/zeta.2025.10.2.113-122. Disponível em: https://journal.uim.ac.id/index.php/zeta/article/view/2750. Acesso em: 4 aug. 2026.