1. Population Reference Bureau (PRB). World Population Data Sheet 2013. 2013; Washington, DC: Population Reference Bureau.
2. Chivian E, Grifo F, Rosenthal J. Global environmental degradation and biodiversity loss: implications for human health. 1998; Washington, DC: Islands Press. 7–38. Biodiversity and human health.
3. WHO. World malaria report. 2013; Geneva: WHO. 284.