@article {435,
	title = {Key to the Palearctic species of the genus Orthoneura Macq.},
	year = {1953},
	keywords = {Key to species, Orthoneura, Orthonevra, Syrphidae},
	author = {Stackelberg, A.A.}
}
@article {434,
	title = {The Palearctic [ibid.] species of the genus Orthoneura Macq. (Diptera, Syrphidae)},
	journal = {Entomological Review},
	volume = {XXXIII},
	year = {1953},
	pages = {1-21},
	type = {manuscript copy},
	keywords = {Diptera, Key to species, Orthoneura, Palaearctic, Syrphidae},
	author = {Stackelberg, A.A.}
}
@article {565,
	title = {Identification key of Siberian species (Orthoneura)},
	journal = {(Russian)},
	year = {1979},
	pages = {49-56},
	keywords = {Key to species, Orthoneura, Orthonevra, Palaearctic, Syrphidae},
	author = {Violovitsh, N.A.}
}
