Economou, Panos, and Richard J. Peppin. “A Comparison of ISO 9613-2 and Advanced Calculation Methods: Predictions Versus Experimental Results”. Canadian Acoustics 40, no. 3 (September 1, 2012): 54–55. Accessed January 18, 2022. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2536.