O. W.  Purvis and Smith, C. W., ?Trapeliopsis Hertel & Gotth. Schneid. (1980)?, in Lichens of Great Britain and Ireland, London: British Lichen Society, 2009, pp. 908-911.

S. H. J. J.  Louwhoff, James, P. W., and Smith, C. W., ?Xanthoparmelia?, in Lichens of Great Britain and Ireland, London: British Lichen Society, 2009, pp. 963-967.

O. L.  Gilbert, Purvis, O. W., and Smith, C. W., ?Stereocaulon?, in Lichens of Great Britain and Ireland, London: British Lichen Society, 2009, pp. 858-865.

V.  Giavarini, ?Microcalicium?, in The lichens of Great Britain and Ireland, C. W.  Smith and et al,, Eds. London: British Lichen Society, 2009, pp.  606-607.

V. J.  Giavarini and Purvis, O. W., ?Cyphelium?, in The lichens of Great Britain and Ireland, C. W.  Smith and et al,, Eds. London: British Lichen Society, 2009, pp. 365-368.

C. W.  Smith, Aptroot, A., Coppins, B. J., Fletcher, A., Gilbert, O. L., James, P. W., and Wolseley, P. A., The Lichens of Great Britain and Ireland. London, UK: British Lichen Society, 2009, p. 1046 pp.