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nih.gov
pubmed.ncbi.nlm.nih.gov
Cibois, A.; Thibault, J.-C.; Bonillo, C.; Filardi, C. E.; Pasquet, E. (2017). "Phylogeny and biogeography of the imperial pigeons (Aves: Columbidae) in the Pacific Ocean". Molecular Phylogenetics and Evolution. 110: 19–26. Bibcode:2017MolPE.110...19C. doi:10.1016/j.ympev.2017.02.016. PMID28249741.
Woinarsky, J. C. Z. (2014). "Consumption of pawpaw Carica papaya foliage by Christmas Island Imperial-Pigeons Ducula whartoni: Health or hunger?". Australian Field Ornithology. 31 (3): 150–158. ISSN1448-0107.