Coles BF, Nekola JC. 2010. Pupillid land snails of eastern North America. Amer. Malec. Bull. 28:29-57

Chetail M, Fournie J. 1984. Calcium dynamics in land gastropods. American Zoologist 24:857-870

Hopkin SP, Laskowsky R. 1996. Effect of Zn, Cu, Pb, and Cd on fitness in snails (Helix aspersa). Ecotoxicology and Enviromental Safety 34:59-69.

Mordan PB, Naggs F, Wade CM. 2006. Evolutionary relationships among the Pulmonate land snails and slugs (Pulmonata, Stylommatophora). Biological Journal of the Linnean Society 87:593-610.

Nekola, Jeffrey. 2009. Conservation Priotization of the Ontario and Quebec Land Snail Faunas. University of New Mexico Department of Biology.

Tompa S, Wilbur M. 1977. Calcium mobilisation during reproduction in snail Helix aspersa. Animal Learning and Behavior 26:15-19.

Vaufleury, Gomot-de. 2000. Standardized growth toxicity testing (Cu, Zn, Pb and pentachlorophenol) with Helix aspersa. Ecotoxicology and Safety 46:41-50.