Gupta, S., M. Shuaib, S. Becker, M. M. Rahman, and D. H. Peters. “Multiple Indicator Cluster Survey 2003 in Afghanistan: Outdated Sampling Frame and the Effect of Sampling Weights on Estimates of Maternal and Child Health Coverage”. Journal of Health, Population and Nutrition, vol. 29, no. 4, Aug. 2011, pp. 388-99, doi:10.3329/jhpn.v29i4.8456.