@article{Tuljapurkar1995,
author = {Tuljapurkar, S. and Li, N. and Feldman, M.W.},
title= {High sex ratios in China's future},
year = {1995},
doi = {10.1126/science.7846529},
journal = {Science},
volume = {267},
number = {5199},
pages = {874--876},
}