@article {Bennett:June 1997:0098-8472:173,
	author = "Bennett J.P.",
	author = "Wetmore C.M.",
	title = "Chemical element concentrations in four lichens on a transect entering Voyageurs National Park",
	journal = "Environmental and Experimental Botany",
	volume = "37",
	year = "June 1997",
	abstract = "",
	pages = "173-185(13)",
	url = "http://www.ingentaconnect.com/content/els/00988472/1997/00000037/00000002/art01039"
	doi = "doi:10.1016/S0098-8472(96)01039-8"
}