Ule, H., C. Novak, R. Ramakrishnan, and R. Gaspar. “Comparison of Experimental and Modeled Insertion Loss of a Complex Multi-Chamber Muffler”. Canadian Acoustics, vol. 30, no. 3, Sept. 2002, pp. 74-75, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1461.