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♦ ¹FOOD RESOURCE UTILIZATION OF THE SKATES Rioraja agassizii (MÜLLER & HENLE, 1841) AND Psammobatis extenta (GARMAN, 1913) ON THE CONTINENTAL SHELF OFF UBATUBA, SOUTH-EASTERN BRAZIL, MUTO, E. Y., SOARES, L. S. H. and GOITEIN, R., Rev. Brasil. Biol., 61(2): 217-238 (2001)
♦ ²Feeding 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