Pfeiffer, L. (1855). Descriptions of thirty-eight new species of land shells, from the collection of H. Cuming. <em>Proceedings of the Zoological Society of London.</em> 23 (291): 111–119. London [13 August]., available online athttps://www.biodiversitylibrary.org/page/30748004 page(s): 118 [details]
MolluscaBase eds. (2021). MolluscaBase. Helicina egregia L. Pfeiffer, 1855. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1313550 on 2024-03-28
original descriptionPfeiffer, L. (1855). Descriptions of thirty-eight new species of land shells, from the collection of H. Cuming. <em>Proceedings of the Zoological Society of London.</em> 23 (291): 111–119. London [13 August]., available online athttps://www.biodiversitylibrary.org/page/30748004 page(s): 118 [details]