@book {1790,
	title = {Diptera Scandinavi{\ae} disposita et descripta},
	series = {Diptera Scandinavi{\ae} disposita et descripta},
	volume = {2},
	year = {1843},
	pages = {441-894},
	publisher = {Officina Lundbergiana},
	organization = {Officina Lundbergiana},
	address = {Lundae [=Lund]},
	url = {http://www.biodiversitylibrary.org/bibliography/8143},
	author = {Zetterstedt, J. W.}
}
@book {1308,
	title = {Diptera Scandinavi{\ae} disposita et descripta},
	series = {Diptera Scandinavi{\ae} disposita et descripta},
	volume = {1},
	year = {1842},
	publisher = {Officina Lundbergiana},
	organization = {Officina Lundbergiana},
	address = {Lundae [=Lund]},
	url = {http://www.biodiversitylibrary.org/bibliography/8143},
	author = {Zetterstedt, J. W.}
}
@book {1209,
	title = {Systematische Beschreibung der bekannten europaischen zweiflugeligen Insekten},
	volume = {3},
	year = {1822},
	pages = {x + 416 pp., pls. 22-32},
	publisher = {Dritter Theil. Schulz-Wundermann, Hamm.},
	organization = {Dritter Theil. Schulz-Wundermann, Hamm.},
	url = {http://www.biodiversitylibrary.org/item/49298$\#$page/1/mode/1up},
	author = {Meigen, J.W.}
}
@article {586,
	title = {Revision of the Nearctic species of <i>Platycheirus</i> (Diptera, Syrphidae)},
	journal = {The Canadian Entomologist},
	volume = {122},
	number = {7-8},
	year = {1990},
	pages = {659-766},
	address = {Ottawa},
	keywords = {Arthropods, Diptera, Insects, Invertebrates, NEARCTIC REGION, Platycheirus, Platycheirus (Carposcalis), Platycheirus (Eocheilosia), Platycheirus (Pachysphyria), Platycheirus (Platycheirus), Platycheirus (Platycheirus) nearcticus Vockeroth, Platycheirus (Platycheirus) orarius Vockeroth, Platycheirus (Pseudoplatychirus), Revision \& distribution including first records, Syrphidae},
	url = {http://pubservices.nrc-cnrc.ca/rp-ps/absres.jsp?jcode=ent\&ftl=Ent122659-7\&lang=eng},
	author = {Vockeroth, J.R.}
}
@article {1928,
	title = {First phylogeny of predatory Flower flies (Diptera, Syrphidae, Syrphinae) using mitochondrial COI and nuclear 28S rRNA genes: conflict and congruence with the current tribal classification},
	journal = {Cladistics},
	volume = {24},
	year = {2008},
	pages = {543-562},
	url = {http://entomology.si.edu/StaffPages/Mengual_Ximo/2008_Cladistics.pdf},
	author = {Mengual, Ximo and St{\r a}hls, Gunilla and Rojo, Santos}
}
