@article{Kohler2002,
author = {Kohler, H.-P. and Ortega, J.A.},
title= {Tempo-adjusted period parity progression measures: Assessing the implications of delayed childbearing for cohort fertility in Sweden, the Netherlands and Spain},
year = {2002},
doi = {10.4054/DemRes.2002.6.7},
volume = {6},
number = {7},
pages = {145--190},
}