@article {4,
	title = {Black fungus-gnats in deciduous forest habitat in northern Europe, with the description of Bradysia arcula sp. n. (Diptera: Sciaridae)},
	journal = { Entomologica Fennica},
	volume = {18},
	year = {2007},
	author = {PEKKA VILKAMAA and Jukka Salmela and Heikki Hippa}
}
