SCHARMANN, Wolfgang. Porters Punktesystem zur ethischen Abwägung von Tierversuchen. ALTEX - Alternatives to animal experimentation, [S. l.], v. 10, n. 2, p. 20–26, 1993. Disponível em: https://www.altex.org/index.php/altex/article/view/1804. Acesso em: 3 may. 2024.