@article {4544,
	title = {Seasonality of ascospore production in two lirellate lichens: Alyxoria (Opegrapha) varia and Phaeographis dendritica},
	journal = {British Lichen Society Bulletin},
	volume = {117},
	year = {2015},
	pages = {7-14},
	author = {Pentecost, A.}
}
@article {4543,
	title = {Growth and development of ascomata in two species of Arthoniales, Arthonia calcarea and Alyxoria varia (lichenized Ascomycota: Arthoniaceae and Lecanographaceae)},
	journal = {Nova Hedwigia},
	volume = {98},
	year = {2014},
	pages = {41-49},
	issn = {00295035},
	doi = {10.1127/0029-5035/2013/0136},
	url = {http://www.ingentaconnect.com/content/10.1127/0029-5035/2013/0136},
	author = {Pentecost, A.}
}
@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.}
}
