Kroh, A.; Mooi, R. (2019). World Echinoidea Database. Echinocardium Gray, 1825. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2019) European Register of Marine Species at: http://www.marbef.org/data/aphia.php?p=taxdetails&id=123426 on 2019-12-06
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2019). European Register of Marine Species. Echinocardium Gray, 1825. Accessed at: http://www.marbef.org/data/aphia.php?p=taxdetails&id=123426 on 2019-12-06
basis of recordHansson, H.G. (2001). Echinodermata, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i>. 50: pp. 336-351. (look up in RoR) [details]
additional sourceClark, A.M. & Courtman-Stock, J. (1976). The echinoderms of southern Africa. Publ. No. 766. British Museum (Nat. Hist), London. 277 pp.[details]