1. Arnold F, Liu Z. Sex preference, fertility, and family planning in China. Popul Dev Rev. 1986;12:221–46.
2. Gu B, Roy K. Sex ratios at birth in China, with reference to other areas in East Asia: what we know. Asia Pac Popul J. 1995;10(3):17–42.
3. Kim DS. The pattern of changing trends and the regional difference in the sex ratio at birth: evidence from Korea and Jilin Province, China. Korea J Popul Dev. 1997;26:19–24.
4. Park CB, Cho NH. Consequences of son preference in a low fertility society: imbalance of the sex ratio at birth in Korea. Popul Dev Rev. 1995;21:59–84.
5. Poston DL, Gu B, Liu P, McDaniel T. Son preference and the sex ratio at birth in China. Soc Biol. 1997;44:55–76.