@article {1477,
	title = {Aluminium concentration versus the base cation to aluminium ratio as predictors for aluminium toxicity in Pinus sylvestris and Picea abies seedlings.},
	volume = {195},
	year = {2004},
	pages = {301-309},
	author = {Van Scholl, L. and Keltjens, W.G. and Hoffland, E. and Van Breemen, N.}
}
