ZERT - Campo,J.L.; Gil,M.G.; Davila,S.G. - Effects of specific noise and music stimuli on stress and fear levels of laying hens of several breeds - Applied Animal Behaviour Science 2005 May; 91(1-2): 75-84
ZENV - Campo,J.L.; Gil,M.G.; Torres,O.; Davila,S.G. - Association between plumage condition and fear and stress levels in five breeds of chickens - Poultry Science 2001 May; 80(5): 549-52
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