@article {4019, title = {Cladoniaceae}, journal = {Nordic Lichen Flora}, volume = {5}, year = {2013}, pages = {117 pp.}, isbn = {978-91-85221-29-5}, author = {Ahti, T. and Stenroos, S. and Moberg, R.} } @inbook {4018, title = {Cladonia}, booktitle = {Lichens of Great Britain and Ireland}, year = {2009}, pages = {309-338}, publisher = {British Lichen Society}, organization = {British Lichen Society}, address = {London}, author = {James, P.W.} }