Ibáñez, M.; Alonso, M. R.; Groh, K.; Hutterer, R. (2003). The Genus Obelus Hartmann, 1842 (Gastropoda, Pulmonata, Helicoidea) and its Phylogenetic Relationships. Zoologischer Anzeiger. 242: 157-167.
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Ibáñez, M.; Alonso, M. R.; Groh, K.; Hutterer, R.
2003
The Genus <i>Obelus</i> Hartmann, 1842 (Gastropoda, Pulmonata, Helicoidea) and its Phylogenetic Relationships