@book {49353,
	title = {Svenska insekter: en orienterande handbok vid studiet av v{\r a}rt lands insektfauna},
	year = {1922},
	pages = {812},
	publisher = {Norstedt},
	organization = {Norstedt},
	address = {Stockholm},
	author = {Tullgren, A and Wahlgren, Einar}
}
@book {49349,
	title = {Diptera scandinaviae, disposita et descripta},
	volume = {11},
	year = {1852},
	pages = {xii + 4091-4545},
	address = {Lundae},
	author = {Zetterstedt, Johann Vilhelm}
}
@book {48136,
	title = {Insecta Britanica, Diptera. Vol. III},
	year = {1856},
	month = {31/03/1856},
	pages = {xxiv+351 p.},
	publisher = {Lovell Reeve},
	organization = {Lovell Reeve},
	address = {London},
	url = {http://www.biodiversitylibrary.org/item/73637},
	author = {Walker, Francis}
}
