↑ Stubbs, Alan E. and Falk, Steven J. (1983). British Hoverflies: An Illustrated Identification Guide. British Entomological & Natural History Society. p. 253, xvpp.
↑ Van Veen, MP (2004) (Hardback). Hoverflies of Northwest Europe, Identification Keys to the Syrphidae. Utrecht: NNV Publishing. pp. 254. ISBN 9050111998.