A.L. Chubb. New nuclear evidence for the oldest divergence among neognath birds: the phylogenetic utility of ZENK. „Molecular Phylogenetics and Evolution”. 30 (1), s. 140–151, 2004. DOI: 10.1016/S1055-7903(03)00159-3. PMID: 15022765. (ang.).
A.L. Chubb. New nuclear evidence for the oldest divergence among neognath birds: the phylogenetic utility of ZENK. „Molecular Phylogenetics and Evolution”. 30 (1), s. 140–151, 2004. DOI: 10.1016/S1055-7903(03)00159-3. PMID: 15022765. (ang.).