Template:Timdal & Krog, 2001
- Timdal, E. & Krog, H. 2001. Further studies on African species of the lichen genus Phyllopsora (Lecanorales). Mycotaxon: An International Journal for Research on Taxonomy & Nomenclature of Fungi, including Lichens 77: 57–89. ResearchGate . Cyberliber (Online)