Wiskin, James W., D.T. Borup, and S.A. Johnson. “Fast and Accurate 3D Acoustic Propagation and Inversion in Layered Media Environments”. Canadian Acoustics 26, no. 3 (September 1, 1998): 38–39. Accessed May 12, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1146.