@article {4259,
	title = {A new taxonomy of the Caloplaca citrina group in the Nordic countries, except Iceland},
	journal = {Lichenologist},
	volume = {38},
	year = {2006},
	pages = {1-20},
	issn = {0024-2829},
	doi = {10.1017/S0024282905005402},
	url = {http://www.journals.cambridge.org/abstract_S0024282905005402},
	author = {Arup, U.}
}
