1. Transitions in world population;Population Reference Bureau Staff;Popul Bull,2004
2. World Population Data Sheet of the Population Reference Bureau,2004
3. Social interactions and contemporary fertility transitions;Bongaarts;Popul Dev Rev,1996
4. Prospects for fertility decline and implications for population growth in South Asia;Bongaarts,2001
5. The return of the pharmaceutical industry to the market of contraception;Johansson;Steroids,2000