A. A. Anderberg; B. G. Baldwin; R. G. Bayer; et al. (2007). "Plagiocheilus Arn. ex DC.". In Joachim W. Kadereit; Charles Jeffrey (eds.). Flowering plants: Eudicots; Asterales. The families and genera of vascular plants. Vol. 8. Springer. p. 307. ISBN978-3-540-31050-1.