Rahman, S. M. H. ., M. Rukunuzzaman, R. . Alam, and K. L. . Nahid. “Persistence of Anti-HBs and Immunologic Memory in Children Immunized With Hepatitis B Vaccine”. Bangabandhu Sheikh Mujib Medical University Journal, vol. 16, no. 2, June 2023, pp. 101-5, doi:10.3329/bsmmuj.v16i2.67207.