- World Bank: “Transport services: Reducing barriers to trade”, in Global Economic Prospects, Chapter 4, Washington, 2002. http://www.worldbank.org/prospects/gep2002/chapt4.pdf
Banque mondiale: «Transport services: Reducing barriers to trade», dans Global Economic Prospects, chap.  4, Washington, 2002, http://www.worldbank.org/prospects/gep2002/chapt4.pdf.