1. Wetenschappelijk congres of gewoon snoepreisje?;Fortuin;NRC Handelsblad,1980
2. IFAC information: aims, structure, activities;International Federation of Automatic Control,1979
3. IFIP Information Bulletin No. 14;International Federation for Information Processing,1980
4. Va-t-on oublier l'Europe?;Jacquet-Lagrèze;Le Monde,1981