(of)Hesse, P. (1914). <i>Helix frequens</i> Mousson (Helicidae, Mollusca). <em>Mitteilungen des Kaukasischen Museums - Izvěstija Kavkazskago Muzeja.</em> 6: 253-270, pl. 1. page(s): 268 [details]
MolluscaBase eds. (2025). MolluscaBase. Monacha (Paratheba) P. Hesse, 1914. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1000295 on 2026-05-11
Marine Species Traits editorial board (2026). Marine Species Traits. Monacha (Paratheba) P. Hesse, 1914. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1000295 on 2026-05-11