1. Study on Road Infrastructure Costs: Analysis of Unit Costs and Cost Overruns,2014
2. The economic regulation of French highways: just how private did they become?;Bonnafous;Transp. Policy,2015
3. The cost of road infrastructure in developing countries;Collier;Cent Study African Econ,2013
4. Concesiones de Obras Públicas en Chile 20 Años;de Concesiones,2016
5. Road Infrastructure Cost and Revenue in Europe - European Commission for Mobility and Transport;Doll,2008