@article{Lutz2001,
author = {Lutz, W. and Goujon, A.},
title= {The world’s changing human capital stock: Multi-state population projections by educational attainment},
year = {2001},
doi = {10.1111/j.1728-4457.2001.00323.x},
journal = {Population and Development Review},
volume = {27},
number = {2},
pages = {323--339},
}