1. Acs, Z.J. and Dana, L.P. (2001) Contrasting two models of wealth distribution. Small Business Economics 16: 63–74.
2. Asian Development Bank. (1999) Finance for the poor: Microfinance development strategy, http://www.adb.org/documents/policies/microfinance/default.asp , accessed 22 April 2011.
3. Baxter, W. (1995) People or Penguins. In: C. Pierce and D. VanDeVeer (eds.) People, Penguins and Plastic Trees. Belmont, CA: Wadsworth.
4. Boiling Point. (2005) Scaling up and commercialization of household energy initiatives. 50, http://www.practicalaction.org/docs/energy/boilingpoint50.pdf , accessed 17 April 2011.
5. Brook, P. and Smith, W. (2001) Improving access to infrastructure services by the poor: Institutional and policy responses, http://web.mit.edu/urbanupgrading/waterandsanitation/resources/pdf-files/Brook-ImprovingAccess.pdf , accessed 19 April 2011.