C. Ferreira, “ Immunization aganist hepatitis B in children from endemic zone: evaluation of the antibody response against the DNA recombinant vaccine (Engerix B-20 mcg) ”, Rev. Inst. Med. Trop. São Paulo, vol. 35, no. 1, pp. 89–92, Feb. 1993, Accessed: Jul. 17, 2024. [Online]. Available: https://revistas.usp.br/rimtsp/article/view/29002