@article {583,
	title = {Optimal quantum yield of photosystem II and chlorophyll degradation of Lobaria pulmonaria in relation to pH Lichenologist},
	volume = {28},
	year = {1996},
	pages = {267-278},
	author = {Gauslaa, Y. and Kopperud, C. and Solhaug, K.A.}
}
