Pedrocchi, Vittorio, Daniel Oro, Jacob González-Solís, Xavier Ruiz, and Lluís Jover. 2002. “Differences in Diet Between the Two Largest Breeding Colonies of Audouin’s Gulls: The Effects of Fishery Activities”. Scientia Marina 66 (3):313-20. https://doi.org/10.3989/scimar.2002.66n3313.