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♦ ¹Diet of the Humboldt penguin (Spheniscus humboldti) in northern and southern Chile, C. Herling, B. M. Culik, J. C. Hennicke, Marine Biology (2005) 147: 13–25
♦ ²DIET AND FEEDING BEHAVIOR OF FIN AND BRYDE'S WHALES IN THE CENTRAL GULF OF CALIFORNIA, MEXICO, Bernie R. Tershy, Alejandro Acevedo-G., Dawn Breese and Craig S. Strong, Rev. Inv. Cient. Vol. 1, UABCS, 1993