1. Locus of control, coping behaviors, and performance in a stress setting: A longitudinal study.
2. Psychological characteristics associated with performence in entrepreneurial firms and smaller businesses
3. (1992). Onderzoek naar het verband tussen de perceptie van controle van bedrijfsleiders en de strategie en de resultaten van ondernemingen in de meubelindustrie, Unpublished doctoral dissertation, University of Antwerp (RUCA).
4. and (1992). ‘The relationship between the locus of control of chief executive officers and the successful implementation of strategic intentions and firm performance: An empirical investigation in the furniture industry’, unpublished manuscript, University of Antwerp (RUCA).