Cobbold, E.S. (1935). "Lower Cambrian faunas from Hérault, France". Annals and Magazine of Natural History. 16 (91): 25–48. doi:10.1080/00222933508655023. ISSN0374-5481.
Li, Guoxiang; Zhao, Xin; Gubanov, Alexander; Zhu, Maoyan; Na, Lin (2011-04-24). "Early Cambrian mollusc Watsonella crosbyi: A potential GSSP Index Fossil for the base of the Cambrian Stage 2". Acta Geologica Sinica - English Edition. 85 (2): 309–319. doi:10.1111/j.1755-6724.2011.00400.x. eISSN1755-6724. ISSN1000-9515.
Guo, Jun-Feng; Li, Guo-Xiang; Qiang, Ya-Qin; Song, Zu-Chen; Zhang, Zhi-Fei; Han, Jian; Wang, Wen-Zhe (2021). "Watsonella crosbyi from the lower Cambrian (Terreneuvian, Stage 2) Yanjiahe Formation in Three Gorges Area, South China". Palaeoworld. 30 (1): 1–19. doi:10.1016/j.palwor.2020.04.006. ISSN1871-174X.
Carter, J. G.; Campbell, D. C.; Campbell, M. R. (2000). "Cladistic perspectives on early bivalve evolution". Geological Society, London, Special Publications. 177 (1): 47–79. doi:10.1144/GSL.SP.2000.177.01.04. eISSN2041-4927. ISSN0305-8719.
Cobbold, E.S. (1935). "Lower Cambrian faunas from Hérault, France". Annals and Magazine of Natural History. 16 (91): 25–48. doi:10.1080/00222933508655023. ISSN0374-5481.
Li, Guoxiang; Zhao, Xin; Gubanov, Alexander; Zhu, Maoyan; Na, Lin (2011-04-24). "Early Cambrian mollusc Watsonella crosbyi: A potential GSSP Index Fossil for the base of the Cambrian Stage 2". Acta Geologica Sinica - English Edition. 85 (2): 309–319. doi:10.1111/j.1755-6724.2011.00400.x. eISSN1755-6724. ISSN1000-9515.
Guo, Jun-Feng; Li, Guo-Xiang; Qiang, Ya-Qin; Song, Zu-Chen; Zhang, Zhi-Fei; Han, Jian; Wang, Wen-Zhe (2021). "Watsonella crosbyi from the lower Cambrian (Terreneuvian, Stage 2) Yanjiahe Formation in Three Gorges Area, South China". Palaeoworld. 30 (1): 1–19. doi:10.1016/j.palwor.2020.04.006. ISSN1871-174X.
Carter, J. G.; Campbell, D. C.; Campbell, M. R. (2000). "Cladistic perspectives on early bivalve evolution". Geological Society, London, Special Publications. 177 (1): 47–79. doi:10.1144/GSL.SP.2000.177.01.04. eISSN2041-4927. ISSN0305-8719.