A. Raaj, N. Krishnasamy, and K. Rajendran, “Sero-prevalence of hepatitis B virus and risk analysis of vertical transmission among pregnant women attending the obstetrics and gynecology hospital, Chennai (Tamilnadu), India”, Int J Reprod Contracept Obstet Gynecol, vol. 5, no. 1, pp. 170–174, Dec. 2016.