@article {2211,
	title = {[Sawfly Scolioneura tenella Kl. new for Finland]},
	journal = {Notulae Entomologicae},
	volume = {20},
	year = {1940},
	pages = {1-10},
	author = {H{\'e}llen, W.}
}
@article {2210,
	title = {Die Empria-Arten Finnlands (Hym., Tenthr.)},
	journal = {Notulae Entomologicae},
	volume = {20},
	year = {1940},
	pages = {1-10},
	author = {H{\'e}llen, W.}
}
@article {1450,
	title = {N{\r a}gra parasitsteklar och deras v{\"a}rddjur.},
	journal = {Notulae Entomologicae},
	volume = {20},
	year = {1940},
	pages = {77},
	author = {H{\'e}llen, W.}
}
@article {1449,
	title = {Zur Ichneumonidenfauna Finnlands (Hym.). II.},
	journal = {Notulae Entomologicae},
	volume = {20},
	year = {1940},
	pages = {42-53},
	author = {H{\'e}llen, W.}
}
@book {1448,
	title = {Enumeratio Insectorum Fenniae II Hymenoptera 2. Terebrantia.},
	series = {Helsinki.},
	year = {1940},
	pages = {32 s},
	author = {H{\'e}llen, W.}
}
