1. Behaviour and seasonal variation in heart rate in domestic sheep, Ovis aries;Baldock;Anim. Behav.,1988
2. Video image analysis and animal welfare on farm;Barbera;Anim. Welf.,2003
3. Baxter, M.R., 1986. The design of the feeding environment for the pig. PhD Thesis, University of Aberdeen.
4. The space requirements of housed livestock;Baxter,1992
5. Space requirements for sows in confinement;Baxter,1983