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♦ ¹Seasonal feeding activity and ontogenetic dietary shifts in crucian carp, Carassius carassius, Olli-Pekka Penttinen & Ismo J. Holopainen, Environmental Biology of Fishes 33: 215-221, 1992.
♦ ²Diet and feeding habits of Economidichthys pygmaeus (Perciformes: Gobiidae) in Lake Pamvotis, NW Greece, Ch. Gkenas, S. Malavasi and I. Leonardos, J. Appl. Ichthyol. (2011), 1–7