@article{Tian2015,
author = {Tian, F.F. and Morgan, S.P.},
title= {Gender composition of children and the third birth in the United States: Gender composition of children and the third birth},
year = {2015},
doi = {10.1111/jomf.12218},
volume = {77},
number = {5},
pages = {1157--1165},
}