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F. A. Richard Hill and Alan Lill. Density and Total Population Estimates for the Threatened Christmas Island Hawk-Owl Ninox natalis // Emu. CSIRO Publishing. — 1998. — Vol. 98, № 3. — P. 209—220. — doi:10.1071/MU98029.
David Algar, Stefanie Hilmer, Don Nickels, Audrey Nickels. Successful domestic cat neutering: first step towards eradicating cats on Christmas Island for wildlife protection // Ecological Management & Restoration. — 2011. — Vol. 12, № 2. — P. 93—101. — doi:10.1111/j.1442-8903.2011.00594.x.