@article {532,
	title = {Invertebrates of the Torhola cave (SW Finland)},
	journal = {NOen},
	volume = {67},
	year = {1987},
	pages = {151-156.},
	author = {Bistr{\"o}m, O. and H. Hippa}
}
@article {511,
	title = {Ancient-forest invertebrates of the Pyh{\"a}n-H{\"a}kki national park in central finland},
	journal = {aefn},
	volume = {185},
	year = {1988},
	pages = {1-69.},
	author = {Bistr{\"o}m, O. and V{\"a}is{\"a}nen, R.}
}
