Xie, Mowen, Xiangyu Liu, Tetsurou Esaki, Zengfu Wang, and Jiehui Huang. “Three-Dimensional Critical Slip Surface Identification and Slope Stability Assessment of 11# Lava Lobe of Unzen Volcano, Japan”. Italian journal of engineering geology and environment (November 30, 2011): 1023–1030. Accessed November 22, 2024. https://rosa.uniroma1.it/rosa02/engineering_geology_environment/article/view/1376.