Megawati, C. D.; Asriningtias, salnan R. .; Palevi, B. R. P. D.; Teo Pei Kian; Sutawijaya, B. .; Fransiska, R. D. . ECG-Based Heart Rate Variability and KNN Classification for Early Detection of Baby Blues Syndrome in Postpartum Mothers. SinkrOn 2025, 9, 2026-2037.