Weiss, William M, Gilbert Burnham, and Peter J Winch. “Evaluating the Experience of GAPS—A Methodology for Improving Quality of Mass Immunization Campaigns in Developing Countries”. Journal of Health, Population and Nutrition 27, no. 5 (November 23, 2009): 684–695. Accessed February 11, 2026. https://banglajol.info/index.php/JHPN/article/view/3780.