Effects of sorghum tannins on the activity of peptidases in the small intestine of the weaned piglet R. Lizardo, J. Peiniau, JM Rouanet, P. Besançon and A. Aumaitre Reprod. Nutr. Dev., 34 6 (1994) 614-615 DOI: 10.1051/rnd:19940612