Fraser, Louis (1842). "Coccothraustes olivaceus". Proceedings of the Zoological Society of London. 10: 144. The volume is dated 1842 on the title page but the article was published in 1843.
Nguembock, B.; Fjeldså, J.; Couloux, A.; Pasquet, E. (2009). "Molecular phylogeny of Carduelinae (Aves, Passeriformes, Fringillidae) proves polyphyletic origin of the genera Serinus and Carduelis and suggests redefined generic limits". Molecular Phylogenetics and Evolution. 51 (2): 169–181. Bibcode:2009MolPE..51..169N. doi:10.1016/j.ympev.2008.10.022. PMID19027082.
Nguembock, B.; Fjeldså, J.; Couloux, A.; Pasquet, E. (2009). "Molecular phylogeny of Carduelinae (Aves, Passeriformes, Fringillidae) proves polyphyletic origin of the genera Serinus and Carduelis and suggests redefined generic limits". Molecular Phylogenetics and Evolution. 51 (2): 169–181. Bibcode:2009MolPE..51..169N. doi:10.1016/j.ympev.2008.10.022. PMID19027082.
Nguembock, B.; Fjeldså, J.; Couloux, A.; Pasquet, E. (2009). "Molecular phylogeny of Carduelinae (Aves, Passeriformes, Fringillidae) proves polyphyletic origin of the genera Serinus and Carduelis and suggests redefined generic limits". Molecular Phylogenetics and Evolution. 51 (2): 169–181. Bibcode:2009MolPE..51..169N. doi:10.1016/j.ympev.2008.10.022. PMID19027082.