• [Wiki] http://en.wikipedia.org/wiki/Pseudobatos.
• [fishbase] https://www.fishbase.se/summary/Pseudobatos-percellens.html.
• [CaltSide2019] Caltabellotta, F. P., Siders, Z. A., Murie, D. J., Motta, F. S., Cailliet, G. M., and Gadig, O. B. F. (2019). Age and growth of three endemic threatened guitarfishes Pseudobatos horkelii, P. percellens and Zapteryx brevirostris in the western South Atlantic Ocean. J Fish Biol., 95:1236--1248. doi:10.1111/jfb.14123.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [RochGadi2013] Rocha, F. and Gadig, O. B. F. (2013). Reproductive biology of the guitarfish Rhinobatos percellens (Chondrichthyes, Rhinobatidae) from the São Paulo coast, Brazil, western South Atlantic Ocean. Journal of Fish Biology, 82:306--317. doi:10.1111/j.1095-8649.2012.03493.x.