MolluscaBase eds. (2021). MolluscaBase. Bela septangularis var. parvulata Sacco, 1904 †. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2021) European Register of Marine Species at: http://marbef.org/data/aphia.php?p=taxdetails&id=752333 on 2024-04-19
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024). European Register of Marine Species. Bela septangularis var. parvulata Sacco, 1904 †. Accessed at: https://vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=752333 on 2024-04-19