1. Alstrup V. & Hawksworth D.L. (1990): The lichenicolous fungi of Greenland.—Meddr Grønland, Biosc. 31: 90 pp.
2. Hawksworth D. L. (1986): Notes on British lichenicolous fungi V.—Notes RBG Edinb. 43: 497–519.
3. Hawksworth D. L. (1990): Notes on British lichenicolous fungi VI.—Notes RBG Edinb. 46: 391–403.