1. Asian Development Bank (undated). Public-Private Partnership Handbook. Available at http://www.apec.org.au/docs/ADB%20Public%20Private%20Partnership%20Handbook.pdf, retrieved on June 3, 2016.
2. The political economy of transport decentralisation;Barankay,2006
3. Ex Ante Construction Costs in the European Road Sector: a Comparison of Public-private Partnerships and Traditional Public Procurement;Blanc-Brude,2006
4. Financial Theory and Corporate Policy;Copeland,1988
5. Revisiting the portuguese experience with public-private partnerships;Cruz;Afr. J. Bus. Manag.,2011