Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2019). European Register of Marine Species.
Cardiocephalus longicollis (Rudolphi, 1819). Accessed at: http://www.marbef.org/data../aphia.php?p=taxdetails&id=109192 on 2019-12-06