Reference
http://unhas.ac.id/tahir/BAHAN-KULIAH/BIO-MEDICAL/NEW/HANBOOK/18_Biomedical_Signal_Analysis.pdf
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6596134
https://vgc.poly.edu/~csilva/papers/thesis/erik-anderson-phd-thesis.pdf