Enta, Tatiana Mitie, Arata Yoshinaga, Norihiko Yamada, and Koji Murata. “Influence of Sapwood and Heartwood on Cryptomeria Japonica Toughness Mechanism in Mode-I Radial-Longitudinal and Tangential-Longitudinal Systems”. BioResources 21, no. 2 (March 12, 2026): 3894–3909. Accessed March 13, 2026. https://ojs.bioresources.com/index.php/BRJ/article/view/25152.