1. Trends in Maternal Mortality: 1990 to 2008;World Health Organization,2010
2. Family planning: the unfinished agenda;Cleland;Lancet,2006
3. The Effects of Contraception on Obstetric Outcomes;Marston,2004
4. Family Planning Worldwide;Clifton,2013
5. Community-Based Health Workers Can Safely and Effectively Administer Injectable Contraceptives: Conclusions for a Technical Consultation;World Health Organization,2009