Pina, T., Esteves, E., & Andrade, J. P. (2003). Gross and histological observations of ovarian development in twaite shad, Alosa fallax fallax, from Rivers Mira and Guadiana (Portugal). Scientia Marina, 67(3), 313–322. https://doi.org/10.3989/scimar.2003.67n3313