F. Llana D, Íñiguez-González G, Díez MR, Arriaga F. Nondestructive testing used on timber in spain: A literature review. Maderas-Cienc Tecnol [Internet]. 2020 Apr. 1 [cited 2024 Dec. 21];22(2):133-56. Available from: https://revistas.ubiobio.cl/index.php/MCT/article/view/3929