The materials to the "black book" of the flora of the Crimean Peninsula.

Bagrikova, N. A., Skurlatova, M. V., (2021). Russian Journal of Biological Invasions 12(3), 244-257. Pleiades Publishing, Moscow, Russia. English language

Powdery mildews of ornamentals.

USA, University of Illinois (1987) External factsheets, University of Illinois, 8 pp., English language