Marion, C. & Vaske-Júnior, T. & Gadig, O.B.F. & Martins, I.A. (2011)
Feeding habits of the shortnose guitarfish, Zapteryx brevirostris (Müller and Henle, 1841) (Elasmobranchii, Rhinobatidae) in southeastern Brazil. Brazilian Journal of Biology, 71(1), 83–89
DOI: 10.1590/S1519-69842011000100013
Martins, I.A. & Martins, C.L. & Leme, A.H.A. (2005)
Biological parameters and population structure of Psammobatis extenta in Ubatuba region, north coast of the State of Sao Paulo, Brazil. Journal of the Marine Biological Association of the United Kingdom, 85(5), 1113–1118
DOI: 10.1017/s0025315405012166