@article{Yoo2018,
author = {Yoo, S.H. and Sobotka, T.},
title= {Ultra-low fertility in South Korea: The role of the tempo effect},
year = {2018},
doi = {10.4054/DemRes.2018.38.22},
volume = {38},
number = {22},
pages = {549‒576},
}