6. Acharya UR, Sudarshan VK, Koh JEW, et al. Application of higher-order spectra for the characterization of Coronary artery disease using electrocardiogram signals. Biomed Signal Process Control. 2017;31:31-43. https://doi.org/10.1016/j.bspc.2016.07.00310.1016/j.bspc.2016.07.003
14. Mishra M, Pratiher S, Banerjee S, Mukherjee A. Grading heart sounds through variational mode decomposition and higher order spectral features. In: 2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) 1–5 (IEEE, 2018). https://doi.org/10.1109/I2MTC.2018.840962010.1109/I2MTC.2018.8409620
19. Ahmad TJ, Ali H, Khan SA. Classification of Phonocardiogram using an Adaptive Fuzzy Inference System. Proc. Int. Conf. Image Process. Comput Vis Pattern Recognit. Proceedings of the 2009 International Conference on Image Processing, Computer Vision, & Pattern Recognition, IPCV 2009, July 13-16, 2009, Las Vegas, Nevada, USA.