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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
♦ ²The feeding ecology of Mustelus schmitti in the southwestern Atlantic: geographic variations and dietary shifts, Mauro Belleggia & Daniel E. Figueroa & Felisa Sánchez & Claudia Bremec, Environ Biol Fish (2012) 95:99–114