Aprilia Kartika, Putri, et al. “Design of A Dekstop-Based Chronological Form Information System to Improve BPJS Claims Using The Waterfall Method”. Greenation International Journal of Engineering Science, vol. 4, no. 2, Aug. 2026, pp. 209-23, https://research.e-greenation.org/GIJES/article/view/1267.