Daniel L. Stevens, and Stephanie A. Schuckers. “Low Probability of Intercept Triangular Modulated Frequency Modulated Continuous Wave Signal Characterization Comparison Using the Spectrogram and the Scalogram”. Global Journals of Research in Engineering, vol. 17, no. F2, Jan. 2017, pp. 37-47, https://engineeringresearch.org/index.php/GJRE/article/view/1583.