1. Audi, R. (1999). The Cambridge dictionary of philosophy. Cambridge University Press.
2. Berg, T.F., & Edvardsen, D.F. (2009). Life-cycle/PPP-contracts in Persbråten secondary and Høybråten elementary schools. Project report 33-2009, Oslo: SINTEF. [Norwegian].
3. The allocation of risk in PPP/PFI construction projects in the UK;Bing;International Journal of Projects Management,2004
4. Bowman, C., & Ambrosini, V. (2010). How value is created, captured and destroyed. European Business Review, 22(5), 479-495.
5. Public private partnerships: An introduction;Broadbent;Accounting, Auditing & Accountability Journal,2003