@article{Timæus2013,
author = {Timæus, I.M.  and Moultrie, T.A. },
title= {Distinguishing the impact of postponement, spacing and stopping on birth intervals: Evidence from a model with heterogeneous fecundity},
year = {2013},
doi = {10.1017/S0021932012000648},
journal = {Journal of Biosocial Science },
volume = {45},
number = {3},
pages = {311--330},
}