Williams, A. D., Nkombo, Y., Nkodia, G., Leonardson, G. and Burd, L. (2014) “Prevalence of smoking during pregnancy in the Republic of the Congo: Maternal smoking is associated with increased risk of prenatal alcohol exposure”, International Journal of Alcohol and Drug Research, 3(1), pp. 105-111. doi: 10.7895/ijadr.v3i1.131.