1. Appleyard, S.J., Hall, A.D., Lawrence, A.B., 2000. Pre-farrowing behaviour distinguishes piglet-savaging gilts from non-piglet-savaging gilts. In: Ramos, A., Pinheiro Machado, L.C., Hotzel, M.J. (Eds.), Proceedings of the International Congress of the International Society for Applied Ethology. Florianopolis, Brazil, p. 62.
2. Appleyard, S.J., Lawrence, A.B., 2001. The farrowing crate limits the effectiveness of functional sow maternal behaviour. In: Garner, J.P., Mench, J.A., Heekin, S.P. (Eds.), Proceedings of the International Congress of the International Society for Applied Ethology. University of California, Davies, p. 195.
3. Baxter, M.R., 1982. The nesting behaviour of sows and its disturbance by confinement at farrowing. In: Bessai, W. (Ed.), Disturbed Behaviour in Farm Animals. Eugen Ulmer, Hohenheim, pp. 101–114.
4. Baxter, M.R., Petherick, J.C., 1980. The effect of restraint on parturition in the sow. In: Nielson, N.C., Hogh, P., Bille, N. (Eds.), Proceedings of the 6th International Pig Veterinary Society Congress. Copenhagen, Denmark, June/July 1980, p. 84.
5. Baxter, S.H., 1981. Welfare and the housing of the sow and suckling piglets. In: Sybesma, W. (Ed.), The Welfare of Pigs. Martinus Nijhoff, The Hague, pp. 276–312.