1. Behavioural aspects of fear;Archer,1979
2. The nesting behaviour of sows and its disturbance by confinement at farrowing;Baxter;Hohenheimer Arb.,1982
3. Heritable variation for aggression as a reflection of individual coping strategies;Benus;Experientia,1991
4. Stress and Animal Welfare;Broom,1993
5. The stress syndrome;Freeman;World Poultry Sci. J.,1987