Mfoumou, E., C. Hedberg, C. Kao-Walter, and S. Narayanswamy. “A New Method of Acoustical Remote Evaluation of Defective Structures and Material Characterization”. Canadian Acoustics 35, no. 3 (September 1, 2007): 148–149. Accessed March 28, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1944.