@article {433,
	title = {Genus Zelima Mg.},
	year = {1952},
	keywords = {Key to species, Syrphidae, Xylota, Zelima},
	author = {Stackelberg, A.A.}
}
@article {438,
	title = {A concise survey of the Palaearctic species of the genus Spilomyia M.G. (Diptera, Syrphidae)},
	journal = {Entomological Review},
	volume = {37},
	year = {1958},
	pages = {758-768},
	keywords = {Key to species, Palaearctic, Spilomyia, survey},
	author = {Stackelberg, A.A.}
}
@article {2896,
	title = {Neue palaarktische Syrphiden-Arten (Diptera)},
	journal = {Stuttgarter Beitr{\"a}ge zur Naturkunde},
	volume = {113},
	year = {1963},
	pages = {1-6},
	url = {http://www.biodiversitylibrary.org/item/104640$\#$page/325/mode/1up},
	author = {Stackelberg, A.A.}
}
