Pahm, A. A., C. S. Scherer, J. E. Pettigrew, D. H. Baker, C. M. Parsons, and H. H. Stein. 2009. Standardized amino acid digestibility in cecectomized roosters and lysine bioavailability in chicks fed distillers dried grains with solubles. Poult. Sci. 88:571-578. Link to full text (.pdf)