Jang, Eun-Suk, and Chun-Won Kang. “Effect of Steam Explosion Treatment on Impregnation of Three Species of Softwoods: North American Spruce, Korean Pine, and Japanese Larch ”. BioResources, vol. 18, no. 1, Jan. 2023, pp. 1454-6, https://ojs.bioresources.com/index.php/BRJ/article/view/22365.