Munmun, F. R., M. E. Rahman, A. F. Jahangir, M. S. A. Patwary, A. S. Chowdhury, and M. Kamruzzaman. “Role of Maternal Smokeless Tobacco Ingestion During Pregnancy in Delivery of Preterm Babies”. Bangladesh Journal of Child Health, vol. 40, no. 3, June 2017, pp. 135-8, doi:10.3329/bjch.v40i3.33052.