O. L.  Gilbert, James, P. W., and Woods, R. G., ?Gyalecta?, in Lichens of Great Britain and Ireland, London: British Lichen Society, 2009, pp. 417-421.

R. G.  Woods and Coppins, B. J., A Conservation Evaluation of British Lichens and Lichenicolous Fungi. Species Status 13, 2nd editionnd ed. Peterborough, UK: Joint Nature Conservation Committee, 2012, p. 155.

O. L.  Gilbert, James, P. W., and Woods, R. G., ?Gyalidea?, in Lichens of Great Britain & Ireland, London: British Lichen Society, 2009.

R. G.  Woods and Coppins, B. J., ?A conservation evaluation of British lichens and lichenicolous fungi?, JNCC Species Status Publication, vol. 13, p. 155 pp, 2012.