1. The state of the world population, 2003,2006
2. Sexually transmitted infections among adolescents: the need for adequate health services;Dehne,2005
3. The second decade: improving adolescent health and development,2001
4. Factors that shape young people's sexual behaviour: a systematic review;Marston;Lancet,2006
5. Adolescent pregnancy: issues in adolescent health and development,2004