1. Agrawal, A. K., Catalini, C., & Goldfarb, A. (2011). The geography of crowdfunding (NBER Working Paper 16820). Cambridge, MA: National Bureau of Economic Research. Retrieved from http://www.nber.org/papers/w16820 .
2. Arvidson, M., Lyon, F., McKay, S., & Moro, D. (2010). The ambitions and challenges of SROI (TSRC Working Paper 49). Birmingham: Third Sector Research Centre. Retrieved from http://www.tsrc.ac.uk/LinkClick.aspx?fileticket=QwHhaC%2br88Y%3d&tabid=500 .
3. Azemati, H., Belinsky, M., Gillette, R., Liebman, J., Selman, A., & Wyse, A. (2013). Social impact bonds: Lessons learned so far. Community Investment Review, 9(1), 23–33.
4. Bammi, R., & Verma, A. (2014). Venture philantropy: An emerging paradigm of venture capital. The XIMB Journal of Management, 11(2), 127–140.
5. Barraket, J., & Yousefpour, N. (2013). Evaluation and social impact measurement amongst small to medium social enterprises: Process, purpose and value. Australian Journal of Public Administration, 72(4), 447–458. https://doi.org/10.1111/1467-8500.12042 .