@book {47,
	title = {The Lichen Flora of Great Britian and Ireland},
	year = {1992},
	publisher = {Natural History Museum Publications},
	organization = {Natural History Museum Publications},
	address = {London},
	author = {O.W. Purvis and D.M. Moore and B.J. Coppins and D.L. Hawksworth and P.W. James}
}
@book {724,
	title = {Macrolichens of East Africa},
	year = {1988},
	publisher = {Henry Ling Ltd, The Dorset Press},
	organization = {Henry Ling Ltd, The Dorset Press},
	address = {Dorchester},
	isbn = {0-565-01039-5},
	author = {T.D.V. Swinscow and Krog, Hildur}
}
@article {648,
	title = {Lichens Collected on an Alaska Highway Expedition in Alaska and Canada},
	journal = {The Bryologist},
	volume = {97},
	number = {2},
	year = {1994},
	pages = {138-157},
	chapter = {138},
	url = {http://www.jstor.org/stable/pdfplus/3243751.pdf},
	author = {Thomson, John W. and Ahti, T}
}
@book {1453,
	title = {Lichens},
	series = {The new naturalist},
	year = {2000},
	pages = {288},
	publisher = {HarperCollins},
	organization = {HarperCollins},
	address = {London},
	isbn = {0002200821},
	author = {Oliver Gilbert}
}
@book {53,
	title = {Lichens of North America},
	year = {2001},
	publisher = {Yale University Press},
	organization = {Yale University Press},
	issn = {0300082495},
	author = {Brodo, Irwin M and Sylvia Duran Sharnoff and Susan Laurie-Bourque and Stephen Sharnoff}
}
@article {1159,
	title = {ArtDatabanken Swedish Species Information Centre},
	year = {2009},
	month = {1/16/10},
	url = {http://www.artdata.slu.se/default.asp}
}
@book {1154,
	title = {The Macrolichens of New England},
	series = {Memoirs of the New York Botanical Garden},
	volume = {96},
	year = {2007},
	publisher = {The New York Botanical Garden Press},
	organization = {The New York Botanical Garden Press},
	address = {China},
	author = {James W. Hinds and Patricia L. Hinds}
}
