Fei He, Stephen A. Billings, Hua-Liang Wei, Ptolemaios G. Sarrigiannis, Yifan Zhao. Spectral Analysis for Nonstationary and Nonlinear Systems: A Discrete-Time-Model-Based Approach. IEEE Trans. Biomed. Engineering, 60(8):2233-2241, 2013. [doi]
Abstract is missing.