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APA Citation
Gong, Q., Lu, J., Xu, H., Chen, Z., Zhou, X., & Han, B. (2021). a modified rock mass classification system for TBM tunnels and tunneling based on the HC method of China. International journal of rock mechanics and mining sciences, 137, . http://access.bl.uk/ark:/81055/vdc_100120046890.0x00000b