@article {751,
	title = {The slugs of Bulgaria (Arionidae, Milacidae, Limacidae, Agriolimacidae - Gastropoda, Stylommatophora)},
	journal = {Annales Zoologici},
	volume = {37},
	year = {1983},
	pages = {71-205},
	author = {Wiktor, A}
}
@article {309,
	title = {The slugs of the former Yugoslavia (Gastropoda terrestria nuda - Arionidae, Milacidae, Limacidae, Agriolimacidae)},
	journal = {Annales Zoologici},
	volume = {46},
	year = {1996},
	pages = {1-110},
	author = {Wiktor, A}
}
@book {67,
	title = {Land Snails and Slugs of Russia and Adjacent Countries},
	year = {2009},
	publisher = {Pensoft},
	organization = {Pensoft},
	address = {Sofia},
	author = {Sysoev, A and Schileyko, A}
}
