@article {566,
	title = {Assessment of the exposure and loads of acidifying and eutrophying pollutants and ozone, as well as their harmful influence on the vitality of the trees and the speulder forest ecosystem as a whole.},
	volume = {105},
	year = {1998},
	pages = {539-571},
	author = {Erisman, J.W. and Draaijers, G.P.J. and Steingr{\"o}ver, E. and Van Dijk, H. and de Vries, W. and Boxman, A.}
}
@article {193,
	title = {Studies in Environmental Science 63},
	year = {1995},
	institution = {Elsevier},
	address = {Amsterdam},
	author = {Erisman, J.W. and Draaijers, G.P.J.}
}
