@article {1556,
	title = {Nitrogen concentrations in mosses indicate the spatial distribution of atmospheric nitrogen deposition in Europe.},
	journal = {Environmental Pollution},
	volume = {159},
	year = {2011},
	pages = {2852-2860},
	author = {Harmens, H. and Norris, D.A. and Cooper, D.M. and Mills, G. and Steinnes, E. and Kubin, E. and Thoni, L. and Aboal, J.R. and Alber, R. and Carballeira, A. and Coskun, M. and De Temmerman, L. and Frolova, M. and Frontasyeva, M. and Gonzales-Miqueo, L. and Jeran, Z. and Leblond, S. and Liiv, S. and Mankovska, B. and Pesch, R. and Poikolainen, J. and Ruhling, A. and Santamaria, J.M. and Simoneie, P. and Schroder, W. and Suchara, I. and Yurukova, L. and Zechmeister, H.G.}
}
@article {1570,
	title = {Nitrogen content, 15N natural abundance and biomass of the two pleurocarpous mosses Pleurozium schreberi (Brid.) Mitt.and Scleropodium purum (Hedw.) Limpr. in relation to atmospheric nitrogen deposition.},
	journal = {Environmental Pollution},
	volume = {134},
	year = {2005},
	pages = {465-473},
	author = {Solga, A. and Burkhardt, J. and Zechmeister, H.G. and Frahm, J.P.}
}
