Pertiwi, Y., Dony Permana, Nonong Amalita, and Admi Salma. “Modeling Human Development Index in Papua and West Sumatera With Multivariate Adaptive Regression Spline”. UNP Journal of Statistics and Data Science, vol. 1, no. 3, May 2023, pp. 188-95, doi:10.24036/ujsds/vol1-iss3/54.