1. WHO analysis of causes of maternal death: a systematic review;KS Khan;Lancet,2006
2. Too far, too little, too late: a community-based case-control study of maternal mortality in rural west Maharashtra, India;BR Ganatra;Bulletin of the World Health Organization,1998
3. Maine D (1991) Safe Motherhood Programs: Options and Issues. New York: Center for Population and Family Health, Columbia University.
4. World Health Organization (1990) The Prevention and Management of Postpartum Haemorrhage. Report of a Technical Working Group, Geneva, 3–6 July, 1989. Geneva.
5. Measurement of blood loss: review of the literature;MN Schorn;Journal of midwifery & women’s health,2010