Boonstra, M.J., J.F. Rijsdijk, C. Sander, E. Kegel, B. Tjeerdsma, H. Militz, J. Van Acker, and M. Stevens. 2014. “Microstructural and Physical Aspects of Heat Treated Wood. Part 1. Softwoods”. Maderas. Ciencia Y Tecnología 8 (3):193-208. https://revistas.ubiobio.cl/index.php/MCT/article/view/1469.