@article {835,
	title = {The influence of ants on the survival of mountain birches during an Oporinia autumnata (Lep., Geometridae) outbreak.},
	journal = {Oecologica},
	volume = {47},
	year = {1980},
	pages = {39-4},
	author = {Laine, K. and Niemel{\"a}, P.}
}
