1. ASPA Employers Survey (2009), Netherlands Interdisciplinary Demographic Institute, ASPA Employers Survey, The Hague.
2. Baltes, P.B., Staudinger, U.M. and Lindenberger, U. (1999), “Lifespan psychology: theory and application to intellectual functioning”, Annual Review of Psychology, Vol. 50, pp. 471‐507.
3. Barth, M.C., McNaught, W. and Rizzi, P. (1993), “Corporations and the ageing workforce”, in Mirvis, P.H. (Ed.), Building the Competitive Workforce: Investing in Human Capital for Corporate Success, Wiley and Sons, New York, NY, pp. 156‐200.
4. Becker, G.S. (1962), “Investment in human capital: a theoretical analysis”, Journal of Political Economy, Vol. 70 No. 5, pp. 9‐49.
5. Brewster, C., Hegewisch, A., Mayne, L. and Tregaskis, O. (1994), “Methodology of the price waterhouse Cranfield project”, in Brewster, C. and Hegewisch, A. (Eds), Policy and Practice in European Human Resource Management, Routledge, London, pp. 230‐45.