@article{Chang2011,
author = {Chang, H. and Dong, X.Y. and MacPhail, F.},
title= {Labor migration and time use patterns of the left-behind children and elderly in rural China},
year = {2011},
doi = {10.1016/j.worlddev.2011.05.021},
volume = {39},
number = {12},
pages = {2199--2210},
}