Tanaka, T., S. Avramidis, and S. Shida. “A Preliminary Study on Ultrasonic Treatment Effect on Transverse Wood Permeability”. Maderas-Cienc Tecnol, vol. 12, no. 1, Dec. 2014, pp. 3-9, https://revistas.ubiobio.cl/index.php/MCT/article/view/1376.