Prager, M.; Johansson, E. I. A.; Andersson, S. (2008). "A molecular phylogeny of the African widowbirds and bishops, Euplectes spp. (Aves: Passeridae: Ploceinae)". Molecular Phylogenetics and Evolution. 46 (1): 290–302. doi:10.1016/j.ympev.2007.09.010. PMID17964815.
Prager, M.; Johansson, E. I. A.; Andersson, S. (2008). "A molecular phylogeny of the African widowbirds and bishops, Euplectes spp. (Aves: Passeridae: Ploceinae)". Molecular Phylogenetics and Evolution. 46 (1): 290–302. doi:10.1016/j.ympev.2007.09.010. PMID17964815.