Novak, C., J. Charbonneau, and H. Ule. “Comparison of Non-Stationary Loudness Results to Equal Loudness Contours”. Canadian Acoustics, vol. 37, no. 3, Sept. 2009, pp. 66-67, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2136.