@article{Zeng2016,
author = {Zeng, Y. and George, L. and Sereny, M. and Gu, D. and Vaupel, J.W.},
title= {Older parents enjoy better filial piety and care from daughters than sons in China},
year = {2016},
journal = {American Journal of Medical Research},
volume = {3},
number = {1},
pages = {244--272},
}