@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}
}
@article {49,
	title = {Pyrenocollema elegans, a new marine lichen},
	journal = {The Lichenologist},
	volume = {24},
	number = {1},
	year = {1992},
	pages = {7-11},
	chapter = {7},
	author = {R. Santesson}
}
