Annas S, Aswi A, Hidayat R. Determinants of Maternal Mortality in Indonesia: A B-Spline Nonparametric Regression Approach to Identify Nonlinear Relationship Patterns. Mathline [Internet]. 2026 Feb. 24 [cited 2026 Mar. 17];11(1):31-44. Available from: https://mathline.unwir.ac.id/index.php/Mathline/article/view/1015