@article {Bennett:February 1999:0098-8472:75,
	author = "Bennett J.P.",
	author = "Wetmore C.M.",
	title = "Changes in element contents of selected lichens over 11 years in northern Minnesota, USA",
	journal = "Environmental and Experimental Botany",
	volume = "41",
	year = "February 1999",
	abstract = "",
	pages = "75-82(8)",
	url = "http://www.ingentaconnect.com/content/els/00988472/1999/00000041/00000001/art00055"
	doi = "doi:10.1016/S0098-8472(98)00055-0"
}