Xavier, C. X., H. Abedi, J. Boger, P. Morita, A. Wong, and G. Shaker. “2D-Multiple Signal Processing Approach to Human Orientation Monitoring Using Millimeter-Wave FMCW Radar”. Journal of Computational Vision and Imaging Systems, vol. 5, no. 1, Jan. 2020, p. 2, https://openjournals.uwaterloo.ca/index.php/vsl/article/view/1650.