Kartini, A. Y., J. R. Budiani, and M. Arifat. “THE DESIGN OF STANDARD GRAPH FOR TODDLER GROWTH USES NONPARAMETRIC PENALIZED SPLINE REGRESSION”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan, Vol. 19, no. 2, Apr. 2025, pp. 917-26, doi:10.30598/barekengvol19iss2pp917-926.