1. Asea, P. K. (2005). The Informal Sector: The Paradox of Flexibility and Innovation. Economic Development Review.
2. Bacchetta, M., Ernst, E., & Bustamante, J. P. (2012). Globalization and Informal Jobs in Developing Countries. World Trade Organization and International Labour Office.
3. Biswass, A. K., Tortajada, C., & Braga, B. P. F. (2003). Water Management in 2020 and Beyond. Springer.
4. Bourguignon (2015). The Globalization of Inequality. Princeton University Press.
5. Carré, F., & Heintz, J. (2009). Issues in developing a common framework on informal employment.