• [Wiki] https://en.wikipedia.org/wiki/Raja_polystigma.
• [fishbase] https://www.fishbase.de/summary/Raja-polystigma.html.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [PorcBell2020] Porcu, C., Bellodi, A., Cau, A., Cannas, R., Marongiu, M. F., Mulas, A., and Follesa, M. C. (2020). Uncommon biological patterns of a little known endemic Mediterranean skate, Raja polystigma (Risso, 1810). Regional Studies in Marine Science, 34:101065.