Hans W. Erhard

Individual aggressiveness of pigs can be measured and used to reduce aggression after mixing

Michael T Mendl, M. Mendl, H. Erhard, 1997 .

Consistency of animal order in spontaneous group movements allows the measurement of leadership in a group of grazing heifers

Bertrand Dumont, Alain Boissy, A. Sibbald, 2005 .

Guidelines for the ethical use of animals in applied ethology studies

Cm Sherwin, S. B. Christiansen, D. Lay, 2003 .