@article {568,
	title = {A review of the scarce and threatened flies of Great Britain. Part 6:  Syrphidae.},
	number = {9},
	year = {2014},
	pages = {1-130},
	institution = {Joint Nature Conservation Committee,  },
	address = {Peterborough},
	url = {http://jncc.defra.gov.uk/pdf/Review_of_Syrphidae_Final_Web.pdf},
	author = {S.G Ball and Morris, R}
}
@book {551,
	title = {Britains{\textquoteright} Hoverflies. An introduction to the hoverflies of Britain},
	year = {2015},
	pages = {212},
	publisher = {Princeton University Press},
	organization = {Princeton University Press},
	edition = {Updated Second edition},
	isbn = {069116441X},
	author = {S.G Ball and Morris, R}
}
@article {Ball2007,
	title = {Key to the British Scathophagidae (Diptera)},
	year = {2007},
	keywords = {Diptera, Identification, Scathophagidae},
	url = {http://scathophagidae.myspecies.info/sites/scathophagidae.myspecies.info/files/scathophagid_key.pdf},
	author = {S.G Ball}
}
