Colomba, M.S., Gregorini, A., Liberto, F., Reitano, A., Giglio, S. and Sparacio, I. 2011. Monographic revision of the endemic Helix mazzullii De Cristofori & Jan, 1832 complex from Sicily and re-introduction of the genus Erctella Monterosato, 1894 (Pulmonata, Stylommatophora, Helicidae). Zootaxa. 3134, 1 (Dec. 2011), 1–42. DOI:https://doi.org/10.11646/zootaxa.3134.1.1.