@article {1563,
	title = {Evidence of widespread effects of ozone on crops and (semi-)natural vegetation in Europe (1990{\textendash}2006) in relation to AOT40- and flux-based risk maps.},
	journal = {Global Change Biology},
	volume = {17},
	year = {2011},
	pages = {592-613},
	author = {Mills, G. and Hayes, F. and Simpson, D. and Emberson, L. and Norris, D. and Harmens, H. and Buker, P.}
}
@article {1457,
	title = {Effects of ozone on inter- and intra-species competition and photosynthesis in mesocosms of Lolium perenne and Trifolium repens.},
	journal = {Environmental Pollution},
	volume = {157},
	year = {2009},
	pages = {208-214},
	author = {Hayes, F. and Mills, G. and Ashmore, M.}
}
@article {1458,
	title = {Evidence of widespread ozone damage to vegetation in Europe (1990-2006).},
	year = {2007},
	institution = {Centre for Ecology and Hydrology},
	address = {Bangor, UK.},
	author = {Hayes, F. and Mills, G. and Harmens, H. and Norris, D.}
}
