@article {598,
	title = {Effects of experimental acidification, nitrogen addition and liming on ground vegetation in a mature stand of Norway spruce (Picea abies (L.) Karst.) in SE Sweden},
	journal = {Forest Ecology and Management },
	volume = {108},
	year = {1998},
	pages = {201-213},
	author = {Hallbdcken, L. and Zhang, L.Q.}
}
