Doutres, O., F. Sgard, F. Laville, J. Voix, O. Bouthot, H. Nélisse, P. Marcotte, and J. Boutin. “Is My Material an Efficient Acoustical Material?”. Canadian Acoustics, vol. 43, no. 2, June 2015, pp. 24-25, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2696.