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Grau, A., Linde, M. and Grau, A.M. 2009. Reproductive biology of the vulnerable species Sciaena umbra Linnaeus, 1758 (Pisces: Sciaenidae). Scientia Marina. 73, 1 (Mar. 2009), 67–81. DOI:https://doi.org/10.3989/scimar.2009.73n1067.