Effect of environmental temperature on energy expenditures of the pregnant sow : Interaction with the nature of the diet (wheat straw, lucerne meal) J. NOBLET, J. Y. DOURMAD, S. DUBOIS and J. LE DIVIDICHAnn. Zootech., 37 3 (1988) 208DOI: https://doi.org/10.1051/animres:19880350