Impacts of a modified farrowing pen design on sow and litter performances and air quality during two seasons.

Farmer, C., Devillers, N., Widowski, T.M., and Massé, D.I. (2006). "Impacts of a modified farrowing pen design on sow and litter performances and air quality during two seasons.", Livestock Science, 104(3), pp. 303-312.