* Anonymous (1960) Index of Plant Diseases in the United States. Agriculture Handbook no 165, USDA-ARS (US) 531 pp.
* Lyda SD, 1978. Ecology of Phymatotrichum omnivorum. Annual Review of Phytopathology, 16, 193–209. Available
online: http://annurev.py.16.090178.001205
-------- only one report in the litterature.
* EPPO (2018) Tobacco ringspot virus and Tomato ringspot virus found in the Netherlands. Reporting service 11-2018, 2018-228. Available at https://gd.eppo.int/reporting/article-6422