Ramadhani, F., Dewi, S., Septiana, D., Wahyuningrum, D. R., & Satria, A. (2026). District Level Child Nutrition Vulnerability in North Sumatra Using Composite Indeks, Machine Learning Benchmarking. Jurnal Sistem Komputer Dan Informatika (JSON), 7(4), 1593–1603. https://doi.org/10.30865/json.v7i4.9785