1. Pan American Health Organization. Health Statistics from the Americas. 2003 Edition, 2003; PAHO: Washington DC.
2. Pan American Health Organization. Profiling midwifery in the Americas: models of childbirth care. 2005; PAHO: Washington DC.
3. Evidence-based health policy: three generations of reform in Mexico
4. WHO/UNFPA/UNICEF/World Bank. Reduction of Maternal Mortality. 1999; WHO: Geneva.
5. Consejo Nacional de Población. Mexico ante los desafíos de desarrollo del Milenio. 2005; CONAPO: Mexico City.