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♦ ¹Feeding ecology and abundance of two sympatric skates, the shortfin sand skate Psammobatis normani McEachran, and the smallthorn sand skate P. rudis Günther (Chondrichthyes, Rajidae), in the southwest Atlantic , Ezequiel Mabragaña and Diego A. Giberto, ICES J. Mar. Sci. (2007) 64 (5): 1017-1027
♦ ²Food consumption by the cock fish, Cdorhynchus callorhynchus (Holocephali: Callorhynchidae), from Patagonia (Argentina), Edgardo Di Giácomo, Ana M. Parma & José M. Orensanz, Environmental Biology of Fishes 40: 199-211, 1994