A. Anisar, S. Sifriyani, and A. Dani, “ESTIMATION OF A BI-RESPONSE TRUNCATED SPLINE NONPARAMETRIC REGRESSION MODEL ON LIFE EXPECTANCY AND PREVALENCE OF UNDERWEIGHT CHILDREN IN INDONESIA”, BAREKENG: J. Math. & App., vol. 17, no. 4, pp. 2011-2022, Dec. 2023.