Feenstra, S. G., Q. Nahar, D. Pahan, L. Oskam, and J. H. Richardus. “A Qualitative Exploration of Social Contact Patterns Relevant to Airborne Infectious Diseases in Northwest Bangladesh”. Journal of Health, Population and Nutrition, vol. 31, no. 4, Aug. 2014, pp. 424-3, doi:10.3329/jhpn.v31i4.19976.