1. API [American Petroleum Institute]. (2012). Composite index: Global rating and ranking fiscal systems for oil and natural gas upstream investment. Press release. American Petroleum Institute. Accessed January 5, 2020. https://www.api.org/~/media/files/news/2012/12-march/composite-index-onepager.pdf.
2. Auty, R. M. (1993). Sustaining development in mineral economies: The resource curse thesis. London: Routledge.
3. Blowfield, M., & Dolan, C. (2014). Business as a development agent: Evidence of possibility and improbability. Third World Quarterly, 35(1), 22–42.
4. Bortolotti, B., Fotak, V., & Megginson, W. L. (2015). The rise of sovereign wealth funds: Definition, organization, and governance. In S. Caselli, G. Corbetta, & V. Vecchi (Eds.), Public private partnerships for infrastructure and business development. New York: Palgrave Macmillan.
5. BP. (2019). BP Statistical Review of World Energy 2019. Online at https://www.bp.com/en/global/corporate/energy-economics/statistical-review-of-world-energy.html. Accessed January 5, 2020.