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.