Sadi, T. M., and R. Hassan. “Development of Classification Methods for Wheeze and Crackle Using Mel Frequency Cepstral Coefficient (MFCC): A Deep Learning Approach”. International Journal on Perceptive and Cognitive Computing, vol. 6, no. 2, Dec. 2020, pp. 107-14, doi:10.31436/ijpcc.v6i2.166.