@article {98,
	title = {Studies on some <em>Leptogium</em> species of Western Europe},
	journal = {The Lichenologist},
	volume = {15},
	number = {2},
	year = {1983},
	pages = {109-125},
	chapter = {109},
	author = {P.M J{\o}rgensen and P.W. James}
}
@book {47,
	title = {The Lichen Flora of Great Britian and Ireland},
	year = {1992},
	publisher = {Natural History Museum Publications},
	organization = {Natural History Museum Publications},
	address = {London},
	author = {O.W. Purvis and D.M. Moore and B.J. Coppins and D.L. Hawksworth and P.W. James}
}
