1. Private toll roads: competition under various ownership regimes;De Palma;The Annals of Regional Science,2000
2. Congestion tolls under monopoly;Edelson;American Economic Review,1971
3. Highway franchising: pitfalls and opportunities;Engel;American Economic Review, Papers and Proceedings,1996
4. Fisher, G., Babbar, S., 1996. Private Financing of Toll Roads. RMC Discussion paper, Worldbank, Washington D.C.
5. Going Private: The International Experience with Transport Privatization;Gomez-Ibanez,1993