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♦ ¹Energy flow of a boreal intertidal ecosystem, the Sylt-Rømø Bight, Dan Baird, Harald Asmus, Ragnhild Asmus, Mar Ecol Prog Ser 279: 45–61, 2004
♦ ²Intraspecific dietary variation in the short-beaked common dolphin Delphinus delphis in the Bay of Biscay: importance of fat fish, Laureline Meynier, Claire Pusineri, Jérôme Spitz, M. Begoña Santos, Graham J. Pierce, Vincent Ridoux, MARINE ECOLOGY PROGRESS SERIES Vol. 354: 277–287, 2008