1. See, P. T. et al. (2015). Knowledge of pregnancy danger signs and associated factors among Malaysian mothers. British Journal of Midwifery, 23(11), 800--806.
2. Evance, I. et al. (2013). Causes and Risk Factors for Maternal Mortality in Rural Tanzania -Case of Rufiji Health and Demographic Surveillance Site (HDSS). African Journal of Reproductive Health, 17(3), 119--130.
3. Bhutta, Z. A. et al. (2013). Global maternal, newborn, and child health-so near and yet so far. The New England Journal of Medicine, 369, 2226--2235. doi: 10.1056/NEJMra1111853
4. Ikhtiar, M. et al. (2015). Analysis of maternal mortality determinants in Gowa District South Sulawesi Province, Indonesia. American Journal of Public Health Research, 3(3), 113--115. doi:10.12691/ajphr-3-3-6
5. MacDorman, M. F. et al. (2016). Recent increases in the U.S. maternal mortality rate: disentangling trends from measurement issues. The American College of Obstetricians and Gynecologist, 128(3).