A.  Pentecost, ?Growth and development of ascomata in two species of Arthoniales, Arthonia calcarea and Alyxoria varia (lichenized Ascomycota: Arthoniaceae and Lecanographaceae)?, Nova Hedwigia, vol. 98, pp. 41-49, 2014.

A.  Pentecost and James, P. W., ?Opegrapha?, in Lichens of Great Britain and Ireland, London: British Lichen Society, 2009, pp. 631-647.

A.  Frisch, Thor, G., Ertz, D., and Grube, M., ?The Arthonialean challenge: restructuring Arthoniaceae?, Taxon, vol. 63, pp. 727-744, 2014.

D.  Ertz, Miadlikowska, J., Lutzoni, F., Dessein, S., Raspé, O., Vigneron, N., Hofstetter, V., and Diederich, P., ?Towards a new classification of the Arthoniales (Ascomycota) based on a three-gene phylogeny focussing on the genus Opegrapha?, Mycological Research, vol. 113, pp. 141-152, 2009.

D.  Ertz and Tehler, A., ?The phylogeny of Arthoniales (Pezizomycotina) inferred from nucLSU and RPB2 sequences?, Fungal Diversity, vol. 49, pp. 47-71, 2011.