MolluscaBase eds. (2021). MolluscaBase. Bulla scabra O. F. Müller, 1784. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2021) European Register of Marine Species at: http://www.marbef.org/data./aphia.php?p=taxdetails&id=720745 on 2021-02-27
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2021). European Register of Marine Species. Bulla scabra O. F. Müller, 1784. Accessed at: http://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=720745 on 2021-02-27