ANNAS, Suwardi; ASWI, Aswi; HIDAYAT, Rahmat. Determinants of Maternal Mortality in Indonesia: A B-Spline Nonparametric Regression Approach to Identify Nonlinear Relationship Patterns. Mathline : Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 11, n. 1, p. 31–44, 2026. DOI: 10.31943/mathline.v11i1.1015. Disponível em: https://mathline.unwir.ac.id/index.php/Mathline/article/view/1015. Acesso em: 17 mar. 2026.