Zhong Changping, Zhu Weibin, Huang Weiran, Zhu Siran, and Xu Minghui. 2019. “Risk Analysis and Countermeasure Study of Shield Tunnelling in Karst Stratum of China”. Geotechnical Engineering Journal of the SEAGS & AGSSEA 50 (2). Bangkok, Thailand:136-40. https://doi.org/10.14456/seagj.2019.53.