Mouriño, J., F. Arcos, R. Salvadores, A. Sandoval, and C. Vidal. “Status of the Balearic Shearwater (Puffinus Mauretanicus) on the Galician Coast (NW Iberian Peninsula”. Scientia Marina, vol. 67, no. S2, July 2003, pp. 135-42, doi:10.3989/scimar.2003.67s2135.