@article {2307,
	title = {Auch die Zwergbirke (Betula nana L.) ist Nahrungspflanze von Blattwespenlarven (Hym., Tenthredinoidea)},
	journal = {Annales Entomologici Fennici},
	volume = {37},
	year = {1971},
	pages = {208},
	author = {Perki{\"o}m{\"a}ki, J.}
}
@article {1115,
	title = {Drei f{\"u}r die Fauna Finnlands neue Grabwespen (Hym., Sphecidae)},
	journal = {Annales Entomologici Fennici},
	volume = {37},
	year = {1971},
	pages = {208-209},
	author = {Perki{\"o}m{\"a}ki, J.}
}
