Wojtowicki, J.-L., and J. Nicolas. “Noise Reduction in a Factory Workplace Using Ray Tracing Method: A Complete Study From Prediction to Experimental Validation”. Canadian Acoustics, vol. 23, no. 2, June 1995, pp. 3-10, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/916.