@book {763,
	title = {Growth of Norway spruce (Picea abies) in relation to the AOT40 index.},
	year = {2002},
	type = {Background paper presented at the UNECE Workshop Establishing Ozone Critical Levels II, Goteborg November 2002},
	author = {Skarby, L. and Ottoson, S. and Karlsson, P.E. and Wallin, G. and Sellden, G. and Medin, E. and Pleijel, H.}
}
@article {308,
	title = {Critical levels for ozone in Europe: Testing and finalising the concepts},
	year = {1996},
	author = {Karenlampi, L.},
	editor = {Skarby, L.}
}
@article {754,
	title = {Establishing critical levels for the effects of air pollution on vegetation},
	volume = {85},
	year = {1995},
	pages = {189-200},
	author = {Sanders, G.E. and Skarby, L. and Ashmore, M.R. and Fuhrer, J.}
}
@article {491,
	title = {Establishing critical levels for the effects of air pollution on vegetation},
	volume = {85},
	year = {1995},
	pages = {189-200},
	author = {Ashmore, M.R. and Sanders, G.E. and Skarby, L. and Fuhrer, J.}
}
