MolluscaBase eds. (2021). MolluscaBase.
Clausilia (Serrulina) clessini O. Boettger, 1877 †. Accessed through: Marine Species Traits editorial board (2021) Marine Species Traits at: http://marinespecies.org/traits/aphia.php?p=taxdetails&id=1343238 on 2024-05-07
Marine Species Traits editorial board (2024). Marine Species Traits.
Clausilia (Serrulina) clessini O. Boettger, 1877 †. Accessed at: https://marinespecies.org/traits./aphia.php?p=taxdetails&id=1343238 on 2024-05-07