@inbook {4033, title = {Placidium}, booktitle = {Lichens of Great Britain and Ireland}, year = {2009}, pages = {708-710}, publisher = {British Lichen Society}, organization = {British Lichen Society}, address = {London}, author = {Breuss, O.} } @inbook {4029, title = {Placidiopsis}, booktitle = {Lichens of Great Britain and Ireland}, year = {2009}, pages = {707-708}, publisher = {British Lichen Society}, organization = {British Lichen Society}, address = {London}, author = {Breuss, O.} } @inbook {3070, title = {Catapyrenium}, booktitle = {Lichens of Great Britain \& Ireland}, year = {2009}, publisher = {British Lichen Society}, organization = {British Lichen Society}, address = {London}, author = {Breuss, O.} }