MolluscaBase eds. (2021). MolluscaBase. Helix trizonaloides A. D. Brown, 1862. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1426244 on 2024-04-29
original descriptionBrown A.D. (1862). Descriptions of two new species of <i>Helix</i>. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 13: 333., available online athttps://www.biodiversitylibrary.org/page/1683462[details]