Mao-yan Zhu; Heyo Van Iten; Robt S. Cox; Yuan-long Zhao; Bernd-D. Erdtmann (2000). "Occurrence of Byronia Matthew and Sphenothallus Hall in the Lower Cambrian of China". Paläontologische Zeitschrift. 74 (3): 227–238. Bibcode:2000PalZ...74..227Z. doi:10.1007/BF02988098. S2CID140590999.
Mao-yan Zhu; Heyo Van Iten; Robt S. Cox; Yuan-long Zhao; Bernd-D. Erdtmann (2000). "Occurrence of Byronia Matthew and Sphenothallus Hall in the Lower Cambrian of China". Paläontologische Zeitschrift. 74 (3): 227–238. Bibcode:2000PalZ...74..227Z. doi:10.1007/BF02988098. S2CID140590999.
Mao-yan Zhu; Heyo Van Iten; Robt S. Cox; Yuan-long Zhao; Bernd-D. Erdtmann (2000). "Occurrence of Byronia Matthew and Sphenothallus Hall in the Lower Cambrian of China". Paläontologische Zeitschrift. 74 (3): 227–238. Bibcode:2000PalZ...74..227Z. doi:10.1007/BF02988098. S2CID140590999.