@article {1238,
	title = {Pollination studies on red clover in Finland},
	journal = {Medd. Sv. Fr{\"o}odlaref{\"o}rbund},
	volume = {7},
	year = {1962},
	pages = {106-113},
	author = {Valle, O. and Sarisalo, M. and Paatela, J.}
}
@article {51,
	title = {Distribution of bumble-bees (Hymenoptera, Apidae: Bombus and Psithyrus) in Eastern Fennoscandia.},
	journal = {Notulae Entomologicae},
	volume = {61},
	year = {1981},
	pages = {71-89},
	keywords = {Aculeata, Apidae, Bombus, pdf},
	author = {Pekkarinen, A. and Ter{\"a}s, I. and Viramo, J. and Paatela, J.}
}
