Chang, So-Young; Heron, Amanda; Kwon, John; Maxwell, Geoff; Rocca, Lodovico; Tarajano, Orestes (Fall 2002). "The Global Diamond Industry"(PDF). Chazen Web Journal of International Business. The Trustees of Columbia University: 2. Retrieved 5 July 2016.
Sarah Bracking and Khadija Sharife http://thestudyofvalue.org/wp-content/uploads/2014/05/WP4-Bracking-Sharife-Rough-and-polished-15May.pdf A further version of this was later published as Khadija Sharife & Sarah Bracking (2016) Diamond pricing and valuation in South Africa’s extractive political economy, Review of African Political Economy, 43:150, 556-575, DOI: 10.1080/03056244.2016.1177504. The original report is also available at lcsv-wp4-bracking-sharife-revised-16062014.pdf (manchester.ac.uk) (30th January 2022)