@article {811,
	title = {Wood ants and a geometrid defoliatior of birch: predation outweighs beneficial effects through the host plant.},
	journal = {Oecologica},
	volume = {113},
	year = {1998},
	pages = {509-516},
	author = {Karhu, K. J. and Neuvonen, S.}
}
