1. Fenner F. Small pox and its eradication. History of international public health. Geneva: World Health Organisation; 1988.
2. Glynn IGJ. The life and death of small pox. Cambridge: Cambridge University Press; 2004.
3. Kapp C. South Africa failing people displaced by xenophobia riots. Lancet. 2008;371(9629):1986–7.
4. Valji N. Creating the nation: the rise of violent xenophobia in the new South Africa. York: Centre for the Study of Violence and Reconciliation, York University; 2003.
5. Hamer WH. Epidemic disease in England. Lancet. 1906;1:733–9.