1. Birch, K. (2005). Beneficence, determinism and justice: An engagement with the argument for the genetic selection of intelligence. Bioethics, 19, 12–28.
2. Boissy, A., Arnold, C., Chaillou, E., Désiré, L., Duvaux-Ponter, C., Greiveldinger, L., et al. (2007). Emotions and cognition: A new approach to animal welfare. Animal Welfare, 16(S), 37–43.
3. Bradley, B. (2004). When is death bad for the one who dies? Noûs, 38(1), 1–28.
4. Broom, D. M. (1988). The scientific assessment of animal welfare. Applied Animal Behaviour Science, 20, 5–19.
5. Broom, D. M. (2008). Welfare assessment and relevant ethical decisions: Key concepts. ARBS Annual Review of Biomedical Sciences, 10, T79–T90.