Johanson, Zerina; Trinajstic, Kate; Carr, Robert; Ritchie, Alex (2013). "Evolution and development of the synarcual in early vertebrates". Zoomorphology. 132 (1): 95–110. doi:10.1007/s00435-012-0169-9. S2CID14029833.
Johanson, Zerina; Trinajstic, Kate; Carr, Robert; Ritchie, Alex (2013). "Evolution and development of the synarcual in early vertebrates". Zoomorphology. 132 (1): 95–110. doi:10.1007/s00435-012-0169-9. S2CID14029833.