Beyer et al., 2003. Plexus Verlag Document reference Beyer, M.; Chudy, A.; Hoffmann, L.; Jentsch, W.; Laube, W.; Nehring, K.; Schiemann, R., 2003. Rostock Feed Evaluation System : reference numbers of feed value and requirement on the base of net energy. Plexus VerlagWeb http://books.google.fr/booksCitation key Beyer et al., 2003Datasheets Brewers grains