Maulana, I., and N. Merlina. “ARRHYTHMIA DETECTION FROM IMBALANCED ECG DATA USING CNN, FOCAL LOSS, AND RR INTERVAL FEATURES WITH INTER-PATIENT EVALUATION”. Jurnal Riset Informatika, vol. 8, no. 4, Sept. 2026, pp. 591-00, doi:10.34288/jri.v8i4.514.