@article {71,
	title = {Suomen myrkkypisti{\"a}islajien taantuminen ja uhanalaisuus (The endangered bees, wasps and ants (Hymenoptera, Aculeata) in Finland). },
	journal = {Luonnon Tutkija},
	volume = {91},
	year = {1987},
	pages = {124-129},
	keywords = {Aculeata},
	author = {Pekkarinen, A. and Ter{\"a}s, I. and Wuorenrinne, H.}
}
@article {70,
	title = {Mehil{\"a}iset ja saasteet.},
	journal = {Mehil{\"a}inen},
	volume = {1987},
	year = {1987},
	pages = {128-132},
	keywords = {Aculeata, Apidae, Bombus},
	author = {Ter{\"a}s, I.}
}
@article {58,
	title = {Observations on Bombus humilis (Hymenoptera, Apidae) in Finland},
	journal = {Notulae Entomologicae},
	volume = {67},
	year = {1987},
	pages = {28-29},
	keywords = {Aculeata, Apidae, Bombus, Bombus humilis},
	author = {Pekkarinen, A. and Ter{\"a}s, I.}
}
