@article {640,
	title = {CO2 Exchange and Thallus Nitrogen across 75 Contrasting Lichen Associations from Different Climate Zones},
	journal = {Oecologia},
	volume = {133},
	number = {3},
	year = {2002},
	month = {11/2002},
	pages = {295-306},
	chapter = {295},
	url = {http://www.jstor.org/stable/4223421},
	author = {Palmqvist, Kristin and Leopoldo G. Sancho and Jan-Eric Matsson and Lena Dahlman and Fernando Valladares and Anders Tehler}
}
