translate English to French: Available at: http://www.culma.wayne.edu/pubs/belzer/20031103%20Jobs_Tunnel_Econom.pdf. Last visited: May 11, 2005.
Disponible à : http://culma.wayne.edu/pubs/belzer/20031103%20Jobs_Tunnel_Econom.pdf. Dernière visite : 11 mai 2005.