@article {781,
	title = {Biosphere-atmosphere interactions of ammonia with grasslands: experimental strategy and results from a new European initiative},
	volume = {228 (1)},
	year = {2001},
	pages = {131-145},
	author = {Sutton, M.A. and Milford, C. and Nemitz, E. and Theobald, M.R. and Fowler D. and Schjoerring, J.K. and Mattsson, M.E. and Nielsen, K.H. and Husted, S. and Erisman, J.W. and Oties, R. and Hensen, A. and Mosquera, J. and Cellier, P. and Loubert, B. and David, M. and Genermont, S. and Neftel, A. and Blatter, A. and Herrmann, B. and Jones, S.K. and Horvath, L. and Flhrer, E. and Mantzanas, K. and Koukoura, Z. and Gallagher, M. and Williams, P. and Flynn, M. and Riedo, M.}
}
@article {692,
	title = {Biomonitoring of air quality using plants.},
	year = {2000},
	institution = {WHO Collaborating Centre for Air Quality Management and Air Pollution Control},
	address = {Berlin, Germany},
	author = {Mulgrew, A. and Williams, P.}
}
