BALLS, M. [The three Rs: Looking back ... and forward] [Article in German]. ALTEX - Alternatives to animal experimentation, [S. l.], v. 22, n. 4, p. 227–231, 2005. Disponível em: https://www.altex.org/index.php/altex/article/view/870. Acesso em: 30 jun. 2022.