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Kriegseis, I.; Bessei, W.; Meyer, B.; Zentek, J.; Würbel, Hanno; Harlander-Matauschek, Alexandra (2012). Feather-pecking response of laying hens to feather and cellulose-based rations fed during rearing. Poultry Science, 91(7), pp. 1514-1521. Oxford University Press 10.3382/ps.2011-01865