@article{Shkolnikov2007,
author = {Shkolnikov, V.M.  and Andreev, E.M.  and Houle, R.  and Vaupel, J.W. },
title= {The concentration of reproduction in cohorts of women in Europe and the United States},
year = {2007},
doi = {10.1111/j.1728-4457.2007.00159.x},
journal = {Population and Development Review},
volume = {33},
number = {1},
pages = {67--100},
}