Rigidity Strengthening of Landslide Materials Measured by Seismic Interferometry oleh Keng-Hao Kang, Wei-An Chao, Che-Ming Yang, Ming-Chien Chung, Yu-Ting Kuo, Chih-Hsiang Yeh, Hsin-Chang Liu, Chun-Hung Lin, Chih-Pin Lin, Jyh-Jong Liao, Jui-Ming Chang, Yin-Jeh Ngui, Chien-Hsin Chen, Tung-Lin Tai