Li, L.H.; Yang, Z.F.; Yue, Z.Q.; Zhang, L.Q. (March 2009). "Engineering geological characteristics, failure modes and protective measures of Longyou rock caverns of 2000 years old". Tunnelling and Underground Space Technology. 24 (2): 190–207. Bibcode:2009TUSTI..24..190L. doi:10.1016/j.tust.2008.08.003.
Zhu, Cheng; Wu, Li; Zhu, Tongxin; Li, Feng; Zhang, Yun (May 2013). "Lichenometric dating and the nature of the excavation of the Huashan Grottoes, East China". Journal of Archaeological Science. 40 (5): 2485–2492. Bibcode:2013JArSc..40.2485Z. doi:10.1016/j.jas.2012.07.023.
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Li, L.H.; Yang, Z.F.; Yue, Z.Q.; Zhang, L.Q. (March 2009). "Engineering geological characteristics, failure modes and protective measures of Longyou rock caverns of 2000 years old". Tunnelling and Underground Space Technology. 24 (2): 190–207. Bibcode:2009TUSTI..24..190L. doi:10.1016/j.tust.2008.08.003.
Zhu, Cheng; Wu, Li; Zhu, Tongxin; Li, Feng; Zhang, Yun (May 2013). "Lichenometric dating and the nature of the excavation of the Huashan Grottoes, East China". Journal of Archaeological Science. 40 (5): 2485–2492. Bibcode:2013JArSc..40.2485Z. doi:10.1016/j.jas.2012.07.023.
