Barone, M. & de Ranieri, S. & Fabiani, O. & Pirone, A. & Serena, F. (2007)
Gametogenesis and maturity stages scale of Raja asterias Delaroche, 1809 (Chondrichthyes, Raijdae) from the South Ligurian Sea.
Hydrobiologia, 580(1), 245–254 DOI: 10.1007/s10750-006-0448-x