@article{Leridon2008,
author = {Leridon, H.},
title= {A new estimate of permanent sterility by age: Sterility defined as the inability to conceive},
year = {2008},
doi = {10.1080/00324720701804207},
journal = {Population Studies},
volume = {62},
number = {1},
pages = {15--24},
}