1. Breuer, K., Hemsworth, P.H., Barnett, J.L., Matthews, L.R., Coleman, G.J, 2000. Behavioural response to humans and the productivity of commercial dairy cows. Appl. Anim. Behav. Sci. 66:273–288.
2. Costa, D.A., Reinemann, D.J., 2004. The need for stimulation in various bovine breeds and other species. Bull. Int. Dairy Fed. 388:22–27.
3. Das, K.S., Das, N., 2004. Pre-partum udder massaging as a means for reduction of fear in primiparous cows at milking. Appl. Anim. Behav. Sci. 89: 17–26.
4. De Rosa, G., Napolitano, F., Grasso, F., Pacelli, C., Bordi, A., 2005. On the development of a monitoring scheme of buffalo welfare at farm level. Ital. J. Anim. Sci. 4:115–125.
5. De Rosa, G., Tripaldi, C., Napolitano, F., Saltalamacchia, F., Grasso, F., Bisegna, V., Bordi, A., 2003. Repeatability of some animal related variables in dairy cows and buffaloes. Anim. Welfare 12:625–629.