Palhano Junior L, Gontijo Filho PP. Effect of the route of inoculation on residual virulence of different substrains of Mycobactierium bovis BCG in mice. Rev. Inst. Med. Trop. São Paulo. 1980;22(1):15-19. Accessed June 26, 2024. https://revistas.usp.br/rimtsp/article/view/197273