Reference

Giuseppe Manganelli, Lugio Castagnolo, Folco Giusti (1988): Notulae Malacologicae, XXXIX. Second contribution to the revision of the Oxychilus- species living in the Italian Apennine regions : Hyalina carotii PAULUCCI 1878, Hyalina fragrans PAULUCCI 1878 and Helix ercica BENOIT 1859 (Pulmonata: Zonitidae) – Archiv für Molluskenkunde – 119: 181 - 203.