1. Social behaviour and adrenal cortical activity in heifers;Adeyemo;Appl. Anim. Ethol.,1982
2. Broom, D.M., Johnson, K.G., 1993. Stress and Animal Welfare. Chapman and Hall, New York, p. 211.
3. Fox, M.W., 1984. Husbandry, Behaviour and Veterinary Practice (Viewpoints of a Critic). University Park Press, Baltimore, p. 288.
4. Gill, J.L., 1978. Design and Analysis of Experiments in the Animal and Medical Sciences. Vol. II, Iowa State University Press, Ames, Iowa, pp. 169–190.
5. Observations of cattle behavior applied to the design of handling facilities;Grandin;Appl. Anim. Ethol.,1980