1. Asteriou, D., & Agiomirgianakis, G. M. (1999). Human capital and economic growth: time series evidence from Greece (Brunel University Discussion Paper 99-09), Brunel University.
2. Thresholds externalities in economic development;Azariades;Quarterly Journal of Economics,1990
3. Economic growth in a cross-section of countries;Barro;Quarterly Journal of Economics,1991
4. International comparisons of educational attainment;Barro;Journal of Monetary Economics,1993
5. Productivity, growth, convergence and welfare: what the long-run data show;Baumol;American Economic Review,1986