Sastry, N. S. (2004). Estimating informal employment & poverty in India. New Delhi, India: Human Development Resource Centre.
Srija, A., & Shirke, S. V. (2014). An analysis of the informal labour market in India. Economy Matters, 45(12), 28-29..
Oviedo, A. M., Thomas, M. R., & Karakurum-zdemir, K. (2009). Economic informality: Causes, costs, and policies a literature survey.