1. Carnoy, M., Marachi, R. (2020), “Investing for “Impact” or Investing for Profit? Social Impact Bonds, Pay for Success, and the Next Wave of Privatization of Social Services and Education”, National Education Policy Center (NEPC)
2. Contract among the Commonwealth of Massachusetts, Roca Inc. and Youth Services Inc. (2014)
3. Coram, V., Lester, L., Tually, S., Kyron, M., McKinley, K., Flatau, P., Goodwin-Smith, I. (2022), “Evaluation of the Aspire Social Impact Bond: Final Report”, Centres for Social Impact, Flinders University and The University of Western Australia
4. Costa, M. (2016), Psicologia ambientale e architettonica. Come l'ambiente e l'architettura influenzano la mente e il comportamento, F. Angeli Editor
5. Department for Communities and Local Government (2017), The impact evaluation of the London Homelessness Social Impact Bond