@inbook {4041,
	title = {Opegrapha},
	booktitle = {Lichens of Great Britain and Ireland},
	year = {2009},
	pages = {631-647},
	publisher = {British Lichen Society},
	organization = {British Lichen Society},
	address = {London},
	author = {Pentecost, A. and James, P.W.}
}
@article {3792,
	title = {The Arthonialean challenge: restructuring Arthoniaceae},
	journal = {Taxon},
	volume = {63},
	year = {2014},
	pages = {727-744},
	issn = {00400262},
	doi = {10.12705/634.20},
	url = {http://openurl.ingenta.com/content/xref?genre=article\&issn=0040-0262\&volume=63\&issue=4\&spage=727},
	author = {Frisch, A. and Thor, G. and Ertz, D. and Grube, M.}
}
@article {2866,
	title = {Towards a new classification of the Arthoniales (Ascomycota) based on a three-gene phylogeny focussing on the genus Opegrapha},
	journal = {Mycological Research},
	volume = {113},
	year = {2009},
	pages = {141-152},
	issn = {09537562},
	doi = {10.1016/j.mycres.2008.09.002},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0953756208002219},
	author = {Ertz, D. and Miadlikowska, J. and Lutzoni, F. and Dessein, S. and Rasp{\'e}, O. and Vigneron, N. and Hofstetter, V. and Diederich, P.}
}
