@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 {440,
	title = {Brief survey of Palearctic species of the genus Eumerus Mg. (Diptera: Syrphidae)},
	year = {1965},
	note = {photocopied notes},
	type = {monograph},
	keywords = {Eumerus, Key to species, Palaearctic, survey},
	author = {Stackelberg, A.A.}
}
