@book {42,
	title = {Land Snails of Britain and North-West Europe},
	year = {1979},
	publisher = {Harper Collins Publishers},
	organization = {Harper Collins Publishers},
	address = {Hong Kong},
	author = {Kerney, MP and Cameron, RAD}
}
@article {56,
	title = {Key to the identification of the slugs (Gastropoda: Pulmonata) of Portugal},
	journal = {Journal of Conchology},
	volume = {34},
	year = {1993},
	pages = {377-392},
	author = {Rodriguez, T and Hermida, J}
}
@article {129,
	title = {Key to the identification of the slugs (Gastropoda: Pulmonata) of Portugal},
	journal = {Journal of Conchology},
	volume = {34},
	year = {1993},
	pages = {377-392},
	author = {Rodriguez, T and Hermida, J}
}
