MolluscaBase name details
original description
Hesse, P. (1914). <i>Helix frequens</i> Mousson (Helicidae, Mollusca). <em>Mitteilungen des Kaukasischen Museums - Izvěstija Kavkazskago Muzeja.</em> 6: 253-269, pl. 1. [details]
additional source
Hesse, P. (1915). Beschreibungen neuer Arten. <em>Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft.</em> 47 (2): 58-63. Frankfurt am Main [27 April]., available online at https://www.biodiversitylibrary.org/page/15105381
page(s): 60 [details]