M. M. . Pral, F. L. W. . Fang, and E. de . Rizzo, “Potency control of live, attenuated vaccines against measles used in children vaccinations in the State of São Paulo, Brazil (1976-1980)”, Rev. Inst. Med. Trop. São Paulo, vol. 24, no. 1, pp. 1–5, Feb. 1982, Accessed: Jun. 30, 2024. [Online]. Available: https://revistas.usp.br/rimtsp/article/view/196634