S., N., E. A. Hussein, and L. A. Abdul-Rahaim. “STFT-Based Multiclass Heart Sound Classification Using BiLSTM and CNN-BiLSTM Models ”. Journal of Electronics, Electromedical Engineering, and Medical Informatics, Vol. 8, no. 4, Aug. 2026, pp. 1296-13, doi:10.35882/jeeemi.v8i4.1724.