Norman, Janette; Olsen, Penny; Christidis, Les (1998). "Molecular genetics confirms taxonomic affinities of the endangered Norfolk Island Bookbook Owl Ninox novaeseelandiae undulata". Biological Conservation. 86 (1): 33–36. Bibcode:1998BCons..86...33N. doi:10.1016/S0006-3207(98)00012-3.
Gwee, Chyi Yin; Christidis, Les; Eaton, James A.; Norman, Janette A.; Trainor, Colin R.; Verbelen, Philippe; Rheindt, Frank E. (2017). "Bioacoustic and multi-locus DNA data of Ninox owls support high incidence of extinction and recolonisation on small, low-lying islands across Wallacea". Molecular Phylogenetics and Evolution. 109: 246–258. Bibcode:2017MolPE.109..246G. doi:10.1016/j.ympev.2016.12.024. ISSN1055-7903. PMID28017857.
Norman, Janette; Olsen, Penny; Christidis, Les (1998). "Molecular genetics confirms taxonomic affinities of the endangered Norfolk Island Bookbook Owl Ninox novaeseelandiae undulata". Biological Conservation. 86 (1): 33–36. Bibcode:1998BCons..86...33N. doi:10.1016/S0006-3207(98)00012-3.
Gwee, Chyi Yin; Christidis, Les; Eaton, James A.; Norman, Janette A.; Trainor, Colin R.; Verbelen, Philippe; Rheindt, Frank E. (2017). "Bioacoustic and multi-locus DNA data of Ninox owls support high incidence of extinction and recolonisation on small, low-lying islands across Wallacea". Molecular Phylogenetics and Evolution. 109: 246–258. Bibcode:2017MolPE.109..246G. doi:10.1016/j.ympev.2016.12.024. ISSN1055-7903. PMID28017857.
Gwee, Chyi Yin; Christidis, Les; Eaton, James A.; Norman, Janette A.; Trainor, Colin R.; Verbelen, Philippe; Rheindt, Frank E. (2017). "Bioacoustic and multi-locus DNA data of Ninox owls support high incidence of extinction and recolonisation on small, low-lying islands across Wallacea". Molecular Phylogenetics and Evolution. 109: 246–258. Bibcode:2017MolPE.109..246G. doi:10.1016/j.ympev.2016.12.024. ISSN1055-7903. PMID28017857.
Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (August 2022). "Owls". IOC World Bird List Version 12.2. International Ornithologists' Union. Retrieved 10 December 2022.
Gwee, Chyi Yin; Christidis, Les; Eaton, James A.; Norman, Janette A.; Trainor, Colin R.; Verbelen, Philippe; Rheindt, Frank E. (2017). "Bioacoustic and multi-locus DNA data of Ninox owls support high incidence of extinction and recolonisation on small, low-lying islands across Wallacea". Molecular Phylogenetics and Evolution. 109: 246–258. Bibcode:2017MolPE.109..246G. doi:10.1016/j.ympev.2016.12.024. ISSN1055-7903. PMID28017857.