1. Griffiths, Trans. Br. mycol. Soc. 41: 461?482, 1958 (sexual reproduction and variation in the fungus)
2. Hardison. Mycologia 54: 201?216, 1962 (susceptibility of different hosts)
3. Neill & Hyde, N.Z. Jl. Sci. Technol. 20: 281A-301A, 1939 and 24: 65A-71A, 1942 (descriptions of the disease, the fungus, infection, development etc.)
4. Schumacher, Mycotaxon 8: 125?126, 1979 (taxonomy & nomenclature)
5. Spooner, Helotiales of Australasia: Geoglossaceae, Orbiliaceae, Sclerotiniaceae, Hyaloscyphaceae, J. Cramer, Berlin & Stuttgart, 1987 (taxonomy).