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2. Exploiting the nursing niche: the infant's sucking and feeding in the context of the mother-infant interaction;Brake,1988
3. Nonnutritive sucking by the calf and postprandial secretion of insulin, CCK and gastrin;de Passillé;Physiol. Behav.,1993
4. The effects of early separation on the dairy cow and calf;Flower;Anim. Welfare,2003
5. Behavioural perspectives on weaning in domestic pigs;Fraser,1998