1. Boffey, D. (2013, February 9). British sugar giant caught in global tax scandal. The Guardian. Retrieved from http://www.guardian.co.uk/business/2013/feb/09/british-sugar-giant-tax-scandal
2. Corporate tax avoidance and firm value;Desai;Review of Economics and Statistics,2009
3. Drucker, J. (2012, December 10). Google revenues sheltered in no-tax Bermuda soar to $10 billion. Bloomberg. Retrieved from http://www.bloomberg.com/news/2012-12-10/google-revenues-sheltered-in-no-tax-bermuda-soar-to-10-billion.html
4. Koester, A. (2011). Investor valuation of tax avoidance through uncertain tax positions (Working Paper). Seattle, WA: University of Washington.
5. Kristof, K. (2011, August 31). Top 25 corporate tax dodgers. CBS Moneywatch. Retrieved from http://www.cbsnews.com/8301-505144_162-36945095/top-25-corporate-tax-dodgers/