1. Aguayo, C.G., 1966, Una lista de los moluscos terrestres y fluviales de Puerto Rico, Stahlia
5: 1–17.
2. Bank, R.A. and Gittenberger, E., 2000, On the polytypic and problematic Clausilia dubia: notes on its nomenclature and systematics (Gastropoda, Pulmonata, Clausiliidae), Basteria
64: 15–27.
3. Bank, R.A., Groh, K., and Ripken T.E.J., 2002, Catalogue and bibliography of the non-marine Mollusca of Macaronesia, in: Falkner, M., Groh, K., and Speight, M.C.D. (eds), Collectanea Malacologica, Festschrift für Gerhard Falkner: 89–235. ConchBooks, Hackenheim, Germany.
4. Beckmann, K.-H., 1992, Catalogue and bibliography of the land- and freshwater molluscs of the Maltese islands, the Pelagi islands and the isle of Pantelleria, Heldia
2, Sonderheft 2: 1–60.
5. Bole, J., 1975, Anatomija in taksonomski polazaj vrste Pholeoteras euthrix Sturany 1904 (Gastropoda), Razprave Dissertationes, Slovenska Akademija Znanosti in Umetnosti (IV, Historia Naturalis)
18/2: 33–46.