CAPAPÉ, Christian, GUÉLORGET, Olivier, VERGNE, Yvan in QUIGNARD, Jean-Pierre, 2006, On a rare skate, the speckled ray, Raja polystigma Regan, 1923 (Chondrichthyes: Rajidae) captured off the coast of Languedoc (Southern France, northern Mediterranean). [na spletu]. 2006. Vol. 16, no. 1, p. 37–42. [Dostopano 8 april 2025]. Pridobljeno s: http://www.dlib.si/details/URN:NBN:SI:doc-6WUP0D04
