Söderbom, M., & Teal, F. (2003). Openness and human capital as sources of productivity growth: An empirical investigation. University of Oxford.

Söderbom, M., and F. Teal. Openness and Human Capital as Sources of Productivity Growth: An Empirical Investigation. University of Oxford, 2003.

Söderbom, M., and F. Teal. Openness and Human Capital as Sources of Productivity Growth: An Empirical Investigation. University of Oxford, 2003.