1. Red List Indices to measure the sustainability of species use and impacts of invasive alien species;SHM Butchart;Bird Conserv Int,2008
2. Beissinger SR (2001) Trade in live wild birds: potentials, principles and practices of sustainable use. In: Reynolds JD, Mace GM, Redford KH, Robinson JG, editors. Conservation of exploited species. Cambridge: Cambridge University Press. Pp. 182–202.
3. Can parrots be conserved through sustainable harvesting?;SR Beissinger;BioScience,1992
4. Captured for conservation: will cages save wild birds?;JD Gilardi;Oryx,2006
5. Donald PF, Collar NJ, Marsden SJ, Pain DJ (2010) Facing extinction. London: T & AD Poyser.