Knight Andrew T, Cowling Richard M
DST-NRF Centre of Excellence, Percy FitzPatrick Institute of African Ornithology, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa.
Conserv Biol. 2007 Aug;21(4):1124-6. doi: 10.1111/j.1523-1739.2007.00690.x.