Mask Compliance Modeling Related COVID-19 in Indonesia Using Spline Nonparametric Regression. Jurnal Varian, [S. l.], v. 5, n. 2, p. 179–190, 2022. DOI: 10.30812/varian.v5i2.1895. Disponível em: https://journal.universitasbumigora.ac.id/Varian/article/view/1895. Acesso em: 11 aug. 2025.