Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood (2014) The eBird/Clements checklist of birds of the world: Version 6.9 http://www.birds.cornell.edu/clementschecklist/download, läst 2015-02-01
doi.org
dx.doi.org
Den Tex, Robert-Jan; Leonard, Jennifer A (2013). ”A molecular phylogeny of Asian barbets: Speciation and extinction in the tropics”. Molecular Phylogenetics and Evolution 68 (1): sid. 1–13. doi:10.1016/j.ympev.2013.03.004. PMID 23511217.
Short, L.L. and J. F. M. Horne (2020). Red-crowned Barbet (Psilopogon rafflesii), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.recbar1.01
Den Tex, Robert-Jan; Leonard, Jennifer A (2013). ”A molecular phylogeny of Asian barbets: Speciation and extinction in the tropics”. Molecular Phylogenetics and Evolution 68 (1): sid. 1–13. doi:10.1016/j.ympev.2013.03.004. PMID 23511217.