@article{Zhai2014,
author = {Zhai, Z. and Zhang, X. and Jin, Y.},
title= {Demographic consequences of an immediate transition to a universal two-child policy (Li ji quan mian fang kai er tai zheng ce de ren kou xue hou guo fen xi)},
year = {2014},
journal = {Population Research (Ren kou yan jiu)},
volume = {2},
pages = {3‒17},
}