Classification Of Perceptions Of The Covid-19 Vaccine Using Multivariate Adaptive Regression Spline. Jurnal Varian, [S. l.], v. 6, n. 2, p. 137–148, 2023. DOI: 10.30812/varian.v6i2.2639. Disponível em: https://journal.universitasbumigora.ac.id/Varian/article/view/2639. Acesso em: 24 sep. 2025.