1. Abell, P., Khalaf, H., & Smeaton, D. (1995). An exploration of entry to and exit from self-employment. LSE/CEP Discussion Paper No. 224, London.
2. Amaral, A. M., & Baptista, R. (2007). Transitions from paid-employment into entrepreneurship: An empirical study for Portugal. In M. J. Dowling & J. Schmude (Eds.), Entrepreneurship in Europe: New perspectives. Cheltenham, UK: Edward Elgar.
3. Audretsch, D. B., Carree, M. A., Van Stel, A. J., & Thurik, A. R. (2005). Does self-employment reduce unemployment? Discussion Paper on Entrepreneurship, Growth and Public Policy, #0705, Max Planck Institute of Economics, Jena.
4. Bates, T. (1990). Entrepreneur human capital inputs and small business longevity. Review of Economics and Statistics, 72(4), 551–559.
5. Becker, G. S. (1965). A theory of the allocation of time. The Economic Journal, 75(299), 493–517.