Abbas, Q. and Foreman-Peek, J. (2007), “Human Capital and Economic Growth in Pakistan 1960-2003” Cardiff Economics Working papers, E 2007/22.
Abbas, Q., (2001). Endogenous Growth and Human Capital. A Comparative Study of Pakistan and Srilanka, The Pakistan Development Review, Part 2 (Winter 2001) pp.987-1007.
Abramovitz, M. 1956. "Resource and Output Trends in the United States Since 1870." American Economic Review, May.