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Gittenberger, E., Alonso, M.R. & Ibáñez, M. (1989). Helix pavida Mousson, 1872, and H. nubivaga Mabille, 1882 (Gastropoda Pulmonata: Helicidae), poorly known Helicellinae from the Canary Islands. Basteria, 53: 117-125. Leiden.
Gittenberger, E., Alonso, M.R. & Ibáñez, M. (1989). Helix pavida Mousson, 1872, and H. nubivaga Mabille, 1882 (Gastropoda Pulmonata: Helicidae), poorly known Helicellinae from the Canary Islands. Basteria, 53: 117-125. Leiden.
