@article {680,
	title = {Uebersicht der Gattung Pterocyclos Bens.},
	journal = {Zeitschrift f{\"u}r Malakozoologie},
	volume = {8},
	year = {1851},
	pages = {1-10},
	chapter = {1},
	url = {http://www.biodiversitylibrary.org/item/55066$\#$421},
	author = {L. Pfeiffer}
}
