1. Ackrill, M. 1989. The Cocos (Keeling) Islands.International Conference on Indian Ocean Island States. Centre for Migration and Development Studies, Nedlands, Australia.
2. Armstrong, P.H. 1982. Rabbits (Oryctolagus cuniculus) on islands: a case-study of successful colonization.Journal of Biogeography,9, 353?362.
3. Armstrong, P.H. 1990. Resurgence on Christmas Island?Indian Ocean Review,3(3), 11.
4. Armstrong, P.H. 1991.Under the Blue Vault of Heaven: A Study of Charles Darwin's Sojourn in the Cocos (Keeling) Island. Indian Ocean Centre for Peace Studies, Nedlands, Australia.
5. Armstrong, P.H. 1992.Darwin's Desolate Isles: A Naturalist in the Falklands, 1833 and 1834. Picton Publishing, Chippenham, UK.