@article {525,
	title = {Chlorophyll a fluorescence emission, xanthophyll cycle activity and net photosynthetic rate responses to ozone in some foliose and fruticose lichen species},
	volume = {38},
	year = {2000},
	pages = {281-286},
	author = {Calatayud, A. and Temple, P.J. and Barreno, E.}
}
