* [http://djj.ee.ntu.edu.tw/TFW.htm Class notes of Time frequency analysis and wavelet transform -- from Prof. Jian-Jiun Ding's course website ]
* P. Boggiatto, G. De Donno, and A. Oliaro, “[httphttps://scholar.google.com.tw/scholar_url?url=http://nozdr.ru/data/media/biblioteka/kolxo3/M_Mathematics/MC_Calculus/MCf_Functional%2520analysis/Schulze%2520B.W.,%2520Wong%2520M.W.%2520(eds.)%2520Pseudo-differential%2520operators..%2520Complex%2520analysis%2520and%2520partial%2520differential%2520equations%2520(Birkhauser,%25202010)(ISBN%25203034601972)(O)(294s)_MCf_.pdf%23page%3D254&hl=zh-TW&sa=X&scisig=AAGBfm3k6US20Q9vL3As15cbbJLAFBdsDA&nossl=1&oi=scholarr&ei=gKW8VLroC5Ht8gWvr4DICw&ved=0CBoQgAMoADAA Two window spectrogram and their integrals,]" Advances and Applications, vol. 205, pp. 251–268, 2009.