Martínez-Abraín, Alejandro, Jacob González-Solis, Vittorio Pedrocchi, Meritxell Genovart, Joan Carles Abella, Xavier Ruiz, Juan Jiménez, and Daniel Oro. 2003. “Kleptoparasitism, Disturbance and Predation of Yellow-Legged Gulls on Audouin’s Gulls in Three Colonies of the Western Mediterranean”. Scientia Marina 67 (S2):89-94. https://doi.org/10.3989/scimar.2003.67s289.