Ball Rachel E., Serra-Pereira Barbara, Ellis Jim, Genner Martin J., Iglésias Samuel, Johnson Andrew F., Jones Catherine S., Leslie Rob, Lewis Jennifer, Mariani Stefano, Menezes Gui, Neat Francis, Noble Leslie R., Sims David W. & Griffiths Andrew M., 2019 — Resolving taxonomic uncertainty in vulnerable elasmobranchs: are the Madeira skate (Raja maderensis) and the thornback ray (Raja clavata) distinct species? (vol 17, pg 565, 2016). Conservation Genetics vol. 20, n° 2, p. 403