References

Opinion 573. 1959. Determination under the plenary powers of a lectotype for the nominal species Helix vivipara Linnaeus, 1758, and addition to the Official List of the generic name Viviparus Montfort, 1810, and the family-group name Viviparidae Gray, 1847 (Class Gastropoda). Bulletin of Zoological Nomenclature 17: 117-131.