• [Wiki] http://en.wikipedia.org/wiki/Potamotrygon_leopoldi.
• [fishbase] https://www.fishbase.se/summary/Potamotrygon-leopoldi.
• [CharSant2018] Charvet, P., Santana, F. M., Lima, K. L. D., and Lessa, R. (2018). Age and growth of the endemic Xingu River stingray Potamotrygon leopoldi validated using fluorescent dyes. Journal of Fish Biology, 92:1985--1999. doi:10.1111/jfb.13635.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.