1.
Economisch belang van de Belgische havens: Vlaamse zeehavens, Luiks havencomplex en haven van Brussel – Verslag 2006
La consommation privée en Belgique
The Belgian Iron and Steel Industry in the International Context
Economic Importance of Air Transport and Airport Activities in Belgium – Report 2009
Economic importance of air transport and airport activities in Belgium – Report 2012
Economic importance of the Flemish maritime ports: Report 2002
Economisch belang van de Vlaamse zeehavens: verslag 2003
Economic Importance of the Belgian Ports: Report 2005. Flemish maritime ports and Liège port complex