Conceição, K. & Konno, K. & Melo, R.L. & Marques, E.E. & Hiruma-Lima, C.A. & Lima, C. & Richardson, M. & Pimenta, D.C. & Lopes-Ferreira, M. (2006)
Orpotrin: A novel vasoconstrictor peptide from the venom of the Brazilian Stingray Potamotrygon gr. orbignyi. Peptides, 27(12), 3039–3046
DOI: 10.1016/j.peptides.2006.09.002

Magalhaes, K.W. & Lima, C. & Piran-Soares, A.A. & Marques, E.E. & Hiruma-Lima, C.A. & Lopes-Ferreira, M. (2006)
Biological and biochemical properties of the Brazilian Potamotrygon stingrays: Potamotrygon cf. scobina and Potamotrygon gr. orbignyi. Toxicon, 47(5), 575–583
DOI: 10.1016/j.toxicon.2006.01.028