Zhang et al. 2006(Note: Cites the 1999 discovery publication Early Cambrian Chengjiang Fauna from Kunming Region China (Luo Hui-Lin, Hu Shi-Xie, Chen Liang-Zhong, Zhang Shi-Shan, Tau Yong-Shan), which is in Chinese and not available online) Zhang, Zhifei; Shu, Degan; Han, Jian; Liu, Jianni (2006). "New data on the rare Chengjiang (Lower Cambrian, South China) linguloid brachiopod Xianshanella haikouensis". Journal of Paleontology. 80 (2): 203–211. doi:10.1666/0022-3360(2006)080[0203:NDOTRC]2.0.CO;2.
Chen 2011, p. 259 Chen, Jun-Yuan (2011). "The origins and key innovations of vertebrates and arthropods". Palaeoworld. 20 (4): 275–278. doi:10.1016/j.palwor.2011.07.002.
Zhuravlev 2015, p. 427 (Note: the text includes the phrase "presumed tunicates (Cheungkongella, Phlogites, Shankouclava; Shu et al., 2001; Chen et al., 2003)" treating Phlogites as a tunicate separately from Cheungkongella, a position not supported by any known source) Zhuravlev, A. Yu. (2015). "The Early History of the Metazoa: a Paleontologist's Viewpoint". Biology Bulletin Reviews. 5 (5): 415–461. Bibcode:2015BioBR...5..415Z. doi:10.1134/S2079086415050084.
Zhuravlev 2015, p. 427 (Note: the text includes the phrase "presumed tunicates (Cheungkongella, Phlogites, Shankouclava; Shu et al., 2001; Chen et al., 2003)" treating Phlogites as a tunicate separately from Cheungkongella, a position not supported by any known source) Zhuravlev, A. Yu. (2015). "The Early History of the Metazoa: a Paleontologist's Viewpoint". Biology Bulletin Reviews. 5 (5): 415–461. Bibcode:2015BioBR...5..415Z. doi:10.1134/S2079086415050084.