@article {44961,
	title = {The Caloplaca citrina group in North and Central America},
	volume = {106},
	year = {2003},
	pages = {147-156},
	publisher = {The Bryologist},
	url = {http://www.bioone.org/archive/0007-2745/105/2/pdf/i0007-2745-105-2-262.pdf},
	author = {Wetmore, Clifford, M.}
}
