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♦ ¹Diet, growth and reproduction of four flatfishes on the Portuguese coast, CÉLIA M. TEIXEIRA, MARISA I. BATISTA and HENRIQUE N. CABRAL, Scientia Marina 74(2) June 2010, 223-233
♦ ²Energy flow of a boreal intertidal ecosystem, the Sylt-Rømø Bight, Dan Baird, Harald Asmus, Ragnhild Asmus, Mar Ecol Prog Ser 279: 45–61, 2004