@article{article, title = {{Spectral analysis for nonstationary and nonlinear systems: a discrete-time-model-based approach.}}, url = {{}}, year = {{2013}}, month = {{3}}, author = {{He F and Billings SA and Wei H-L and Sarrigiannis PG and Zhao Y}}, doi = {{10.1109/TBME.2013.2252347}}, volume = {{60}}, journal = {{IEEE Trans Biomed Eng}}, issue = {{8}}, pages = {{2233-2241}}, note = {{Accessed on 2025/08/20}}}