@article{Kohler2001,
author = {Kohler, H.-P. and Philipov, D.},
title= {Variance effects in the Bongaarts-Feeney formula},
year = {2001},
doi = {10.1353/dem.2001.0004},
journal = {Demography},
volume = {38},
number = {1},
pages = {1--16},
}