Graeme Simpson & Janine Rauch (1993). Boister, N. & Ferguson-Brown, K (eds.). "Political Violence: 1991". Centre for the Study of Violence and Reconciliation, Human Rights Yearbook 1992, First Edition. Cape Town: Oxford University Press: 212–239. Archived from the original on 19 August 2010. Retrieved 1 June 2008.
Graeme Simpson & Janine Rauch (1993). Boister, N. & Ferguson-Brown, K (eds.). "Political Violence: 1991". Centre for the Study of Violence and Reconciliation, Human Rights Yearbook 1992, First Edition. Cape Town: Oxford University Press: 212–239. Archived from the original on 19 August 2010. Retrieved 1 June 2008.