1. Barugh, I., Vink, W., Neumann, E. and Mellor, D. An on-farm tool for assessing the well-being of pigs using animal-based criteria. Poster session presented at the meeting of North American Welfare and Epidemiology Conference. Ames, IA. July.
2. Bokma, S. and Kersjes, G. J. K. The introduction of pregnant sows in an established group. Proceedings of the International Congress on Applied Ethology in Farm Animals. Skara, Sweden. Edited by: Unshelm, J. pp.166–169. Darmstadt, Germany: Kuratoriurn für Technik und Bauwesen in der Landwirtschaft.
3. Oral/nasal/facial and other behaviors of sows kept individually outdoors on pasture, soil or indoors in gestation crates
4. The progesterone challenge: steroid hormone changes following a simulated territorial intrusion in female Peromyscus californicus