↑ Stubbs, F. B. Edit. (1986) Provisional Keys to British Plant Galls. Pub. Brit Plant Gall Soc. ISBN0-9511582-0-1., p. 80
↑ Redfern, Margaret; Shirley, Peter; Boxham, Michael (2011). British Plant Galls (Seconded.). Shrewsbury: Field Study Council. pp.282–299. ISBN978-185153-284-1.
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