Fardows, J., A. B. Siddique, N. Farhana, and T. B. Islam. “Review Update on Pneumococcal Conjugate Vaccine: A New Hope for Reduction of Pneumococcal Disease in Bangladesh”. Bangladesh Journal of Infectious Diseases, vol. 2, no. 1, Jan. 2017, pp. 19-22, doi:10.3329/bjid.v2i1.31325.