@article {1851,
	title = {Novye Syrphidae (Diptera) palearkticheskoy fauny},
	journal = {Trudy Zoologicheskogo Instituta Akademii Nauk SSSR (Leningrad)},
	volume = {12},
	year = {1952},
	pages = {350-400},
	keywords = {Macropelecocera, Macropelecocera paradoxa Stackelberg, Psarochilosia, Psarochilosia djakonovi Stackelberg},
	author = {Stackelberg, A.A.}
}
@article {433,
	title = {Genus Zelima Mg.},
	year = {1952},
	keywords = {Key to species, Syrphidae, Xylota, Zelima},
	author = {Stackelberg, A.A.}
}
@article {220,
	title = {The Metasyrphus species of North America (Diptera, Syrphidae)},
	journal = {American Museum Novitates},
	volume = {1590},
	year = {1952},
	pages = {1-27},
	author = {Fluke, C. L.}
}
@article {234,
	title = {An outline of a revised classification of the Syrphidae (Diptera) on phylogenetic lines},
	journal = {Transactions of the Society for British Entomology},
	volume = {11},
	number = {4},
	year = {1952},
	pages = {97-124},
	keywords = {classification, phylogeny, Syrphidae, taxonomy},
	author = {Goffe, Capt. E. Rivenhall}
}
