Sotomayor, Javier, and Mariana Ramírez. “Wave Speed and Modulus of Elasticity by Ultrasound and Stress Waves of Pinus Spp. Mexican Wood Beams”. Revista Ingeniería de Construcción 30, no. 1 (April 13, 2015): 69–79. Accessed October 5, 2024. https://revistachilenadederecho.uc.cl/index.php/ric/article/view/16947.