Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood (2017) The eBird/Clements checklist of birds of the world: Version 2017 http://www.birds.cornell.edu/clementschecklist/download, läst 2017-08-11
doi.org
dx.doi.org
Alström, P.; et al. (2018). ”Complete species-level phylogeny of the leaf warbler (Aves: Phylloscopidae) radiation”. Molecular Phylogenetics and Evolution 126: sid. 141–152. doi:10.1016/j.ympev.2018.03.031.
hbw.com
Clement, P. (2017). Greenish Warbler (Phylloscopus trochiloides). I: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (red.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (hämtad https://www.hbw.com/node/58887 26 december 2017).