Serra-Pereira, B. & Afonso, F. & Farias, I. & Joyce, P. & Ellis, M. & Figueiredo, I. & Gordo, L.S. (2011)
The development of the oviducal gland in the Rajid thornback ray, Raja clavata. Helgoland Marine Research, 65(3): 399–411
DOI: 10.1007/s10152-010-0232-1