@article {720,
	title = {Impacts and fate of experimentally enhanced nitrogen deposition on a British lowland heath. },
	journal = {Environmental Pollution},
	volume = {102},
	year = {1998},
	pages = {27-34},
	author = {Power, S. and Ashmore, M.R. and Cousins, D.A.}
}
@article {810,
	title = {Long term effects of ammonium sulphate on Calluna vulgaris},
	journal = {Journal of Applied Ecology },
	volume = {34},
	year = {1997},
	pages = {208-216},
	author = {Uren, S.C. and Ainsworth, N. and Power, S. and Cousins, D.A. and Huxendurp, L.M. and Ashmore, M.R.}
}
@article {722,
	title = {Long term effects of enhanced nitrogen deposition on a lowland dry heath in southern Britain. },
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {1701-1706},
	author = {Power, S. and Ashmore, M.R. and Cousins, D.A. and Ainsworth, N.}
}
