De Gruyter, J.; Aveskamp, M. M.; Woudenberg, J. H.; Verkley, G. J.; Groenewald, J. Z.; Crous, P. W. (2009). Molecular phylogeny of Phoma and allied anamorph genera: Towards a reclassification of the Phoma complex. Mycological Research. 113(4): 508-519.