@article {1024,
	title = {Levels of Fe, Al, Zn and Cd in Formica aquilonia, F. polyctena and Myrmica ruginodis (Hymenoptera, Formicidae) collected in the vicinity of spruces showing different degrees of needle-loss},
	journal = {Annales Entomologici Fennici},
	volume = {51},
	year = {1989},
	pages = {57-61},
	author = {Yl{\"a}-Mononen, L. and Salminen, P. and Wuorenrinne, H. and Tulisalo, E. and Nuorteva, P.}
}
