1. Wavelet tutorial: www2.iastate.edu/~rpolikar/WAVELETS/waveletindex.html.
2. M.A. Tinati, Time-frequency and time-scale analysis of phonocardiograms with coronary artery disease before and after angioplasty. PhD thesis, Department of Electrical and Electronic Engineering, The University of Adelaide, SA, 1998.
3. Time Frequency and Wavelets in Biomedical Signal Processing;Akay,1997
4. Mathworks Inc., Wavelet Toolbox user's guide, Chapter 1. Wavelets: a new tool for signal analysis, March 1996.
5. Introduction to Wavelets and Wavelet Transforms: a Primer;Burrus,1998