1. Aptroot A., Diederich P., Sérusiaux E., Sipman H.J.M. 1994. Lichens and lichenicolous fungi of Laing Island (Papua New Guinea). Bibliotheca Lichenologica, 57: 19-48.
2. Aptroot A., de Souza M.F., da Silva Cáceres M.E., dos Santos L.A., Spielmann A.A. 2022. New lichen records from Brazil. Archive for Lichenology, 31: 1-51. http://www.fschumm.de/Archive/Vol%2031_Aptroot_new%20records.pdf
3. Archer A.W. 2009. Graphidaceae. In: Flora of Australia. Eds. P.M. McCarthy, B. Kuchlmayr. Vol. 57 (Lichens 5). Canberra, Melbourne: ABRS/CSIRO Publishing, pp. 84-194.
4. Cannon P., Coppins B., Ertz D., Pentecost A., Sanderson N., Simkin J., Wolseley P. 2021. Arthoniales: Lecanographaceae, including the genera Alyxoria, Lecanographa, Phacographa, Plectocarpon and Zwackhia. Revisions of British and Irish Lichens, 14: 1-15. https://www.britishlichensociety.org.uk/sites/www.britishlichensociety.org.uk/files/Lecanographaceae.pdf
5. Culberson C.F. 1972. Improved conditions and new data for identification of lichen products by standardized thin-layer chromatographic method. Journal of Chromatography A, 72: 113-125. https://doi.org/10.1016/0021-9673(72)80013-X