Consequences of the choice of an energy system on the results of least-cost formulation of diets for growing-finishing pigs C. BRETTE, G. DUQUENNE, Y. HENRY, L. JACQUOT, M. PALISSE-ROUSSEL, J.M. PEREZ, D. SAUVANT and Véronique THEILLAUD Ann. Zootech., 35 3 (1986) 296 DOI: 10.1051/animres:19860316