DOURMAD, J.Y., C. LE MOUEL, and P. RAINELLI. 1995. “Reduction of Nitrogen Output from Pig Herds through Better Feeding : Economical Evaluation and Effects of the New Common Agricultural Policy (CAP)”. INRAE Productions Animales 8 (2). APA:135-44. https://doi.org/10.20870/productions-animales.1995.8.2.4120.