@article {1678,
	title = {Nitrogen deposition effects on plant species diversity; threshold loads},
	journal = {Environmental Pollution},
	volume = {179},
	year = {2013},
	pages = {218-223},
	author = {Tipping, E. and Henrys, P.A. and Maskell, L.C. and Smart, S.M.}
}
@article {1571,
	title = {Terricolous lichens as indicators of nitrogen deposition: Evidence from national records.},
	journal = {Ecological Indicators},
	volume = {20},
	year = {2012},
	pages = {196-203},
	author = {Stevens, C.J. and Smart, S.M. and Henrys, P.A. and Maskell, L.C. and Crowe, A. and Simkin, J. and Cheffings, C.M. and Whitfield, C. and Gowing, D.J.G. and Rowe, E.C. and Dore, A.J. and Emmett, B.A.}
}
@article {1299,
	title = {Collation of evidence of nitrogen impacts on vegetation in relation to UK biodiversity objectives},
	year = {2011},
	institution = {JNCC},
	issn = {447},
	author = {Stevens, C.J. and Smart, S.M. and Henrys, P. and Maskell, L.C. and Walker, K.J. and Preston, C.D. and Crowe, A. and Rowe, E. and Gowing, D.J. and Emmett, B.A.}
}
@article {1296,
	title = {Interpretation of evidence of nitrogen impacts on vegetation in relation to UK biodiversity objectives},
	number = {No. 449},
	year = {2011},
	institution = {JNCC},
	author = {Emmett, B.A. and Rowe, E.C. and Stevens, C.J. and Gowing, D.J. and Henrys, P.A. and Maskell, L.C. and Smart, S.M.}
}
@article {1302,
	title = {Nitrogen deposition causes widespread species loss in British Habitats},
	journal = {Global Change Biology},
	volume = {16},
	year = {2010},
	pages = { 671-679},
	author = {Maskell, L.C. and Smart, S.M. and Bullock, J.M. and Thompson, K. and Stevens, C.J.}
}
@article {1300,
	title = {Identifying indicators of atmospheric nitrogen deposition impacts in acid grasslands},
	journal = {Biological Conservation},
	volume = {142},
	year = {2009},
	pages = {2069-2075},
	author = {Stevens, C.J. and Maskell, L.C. and Smart, S.M. and Caporn, S.J.M. and Dise, N.B. and Gowing, D.J.}
}
