Information about the Horn of Africa Biodiversity Hotspot was developed using the book Hotspots Revisited, which cites:

Amori, G. & Gippoliti, S. 2001. Identifying priority ecoregions for rodent conservation at the genus level. Oryx 35:158-165.

Ash, J. S. & Miskell, J.E.. 1998. Birds of Somalia. East Sussex, UK: Pica Press.

Audru, J., Cesar, J. & Lebrun, J.P. (Eds.). 1994. Les plantes vasculaires de la République de Djibouti, Vols. 1 and 2. CIRAD, Département d'Elevage et de Médecine Vétérinaire.

Beydoun, Z.R. & Bichan, H.R.. 1970. The geology of Socotra, Gulf of Aden. The Quarterly Journal of the Geological Society of London 125:413-446.

Cumberlidge, N. & Wranik, W. 2002. A new genus and new species of freshwater crab (Potamoidea: Potamidae) from Socotra Island, Yemen. Journal of Natural History 36:65-77.

D'Huart, J.P. & Grubb, P. 2001. Distribution of the common warthog ( Phacochoerus africanus) and the desert warthog ( Phacochoerus aethiopicus) in the horn of Africa. African Journal of Ecology 39:146-155.

East, R. 1999. African Antelope Database 1998. Cambridge, UK: IUCN.

Edwards, S., Tadesse, M. & Hedberg I. (Eds.). 1995. Flora of Ethiopia and Eritrea, Vol. 2(2). Addis Ababa, Ethiopia & Uppsala, Sweden.

Edwards, S., Tadesse, M., Demissew, S., & Hedberg, I. (Eds.). 2000. Flora of Ethiopia and Eritrea, Vol. 2(1). Addis Ababa, Ethiopia & Uppsala, Sweden.

Edwards, S., Demissew, S. & Hedberg, I. (Eds.). 1997. Flora of Ethiopia and Eritrea, Vol. 6. Addis Ababa, Ethiopia & Uppsala, Sweden.

Friis, I., Thulin, M., Adsersen, H. & Bürger, A. M. In press. Patterns of plant diversity and endemism in the Horn of Africa. Biol. Skr.

Groom, N. 1981. Frankincense and Myrrh. A study of the Arabian Incense Trade. New York: Longman.

Groombridge, B. (Ed.). 1994. Biodiversity Data Sourcebook. Compiled by the World Conservation Monitoring Centre, IUCN-The World Conservation Union, United Nations Environment Programme, World Wide Fund for Nature. Cambridge, UK: World Conservation Press.

Hannah, L., Carr, J.L. & Lankerani, A. 1995. Human disturbance and natural habitat: A biome level analysis of a global data set. Biodiversity and Conservation 4:128-155.

Hedberg, I. & Edwards, S. (Eds.). 1989. Flora of Ethiopia, Vol. 3. Addis Ababa & Asmara, Ethiopia, & Uppsala, Sweden.

Hedberg, I. & Edwards, S. (Eds.). 1995. Flora of Ethiopia and Eritrea, Vol. 7. Addis Ababa, Ethiopia & Uppsala, Sweden.

Hedberg, I., Edwards, S. & Nemomissa, S. (Eds.). 2003. Flora of Ethiopia and Eritrea, Vol. 4(1). Addis Ababa, Ethiopia & Uppsala, Sweden.

Lavin, M., Thulin, M., Labat, J.N. & Pennington, R.T. 2000. Africa, the odd man out: Molecular biogeography of dalbergioid legumes (Fabaceae) suggests otherwise. Syst. Bot. 25:449-467.

Lucas, G. & Synge, H. 1978. The IUCN Plant Red Data Book. Switzerland: IUCN.

Miller, A.G. & Bazara'a, M. 1998. The conservation status of the flora of the Soqotran Archipelago. In H.J. Dumont. (Ed.), Proceedings of the First International Symposium on Soqotra Island: Present and Future, Vol. 1. New York: United Nations Publications.

Miller, A.G. & Cope, T.A. (Eds.). 1996. Flora of the Arabian Peninsula and Socotra, Vol. 1. Edinburgh University Press.

Pearch, M. J., Bates, P. J. J. & Magin, C. 2001. A review of the small mammal fauna of Djibouti and the results of a recent survey. Mammalia 65: 387-409.

Ripley, S.D. & Bond, G.M. 1966. The birds of Socotra and Abd-el-Kuri. Smithsonian Miscellaneous Collections 151, 7: 1-37.

Smith, E.F.G., Arctander, P., Fjeldså, J. & Gedow Amir, O. 1991. A new species of shrike (Laniidae: Laniarius) from Somalia, verified by DNA sequence data from the only known individual. Ibis 133:227-235.

Sohlman, E. 2004. A bid to save the 'Galápagos of the Indian Ocean'. Science 303: 1753.

Thulin, M. (Ed.). 1993. Flora of Somalia, Vol. 1. Kew: Royal Botanic Gardens.

Thulin, M. 1994. Aspects of disjunct distributions and endemism in the arid parts of the horn of Africa. In J.H. Seyani & A.C. Chikuni. (Eds.), Proc. XIIIth Plenary Meeting AETFAT, Malawi 2:1105-1119.

Thulin, M. (Ed.). 1995. Flora of Somalia, Vol. 4. Kew: Royal Botanic Gardens.

Thulin, M. 1999. Chapmannia (Leguminosae-Stylosanthinae) extended. Nordic. J. Bot. 19:597-607.

Thulin, M., Bremer, B., Richardson, J., Niklasson, J., Fay, M.F. & Chase, M.W. 1998. Family relationships of the enigmatic rosid genera Barbeya and Dirachma from the horn of Africa region. Pl. Syst. Evol. 213:103-119.

White, F. & Léonard, J. 1991. Phytogeographical links between Africa and southwest Asia. Fl. Veg. Mundi 9: 229-246.