@article{Casterline2007,
author = {Casterline, J.B. and El-Zeini, L.O.},
title= {The estimation of unwanted fertility},
year = {2007},
doi = {10.1353/dem.2007.0043},
journal = {Demography},
volume = {44},
number = {4},
pages = {729‒745},
}