Aronson, S., 2010, “Animal Control Programs: An Overview,” in Animal Control Programs: A New Look at a Public Responsibility, edited by S. Aronson, Indiana: Pudue University Press, Weast Lafayette, pp.1-10.(關心動物是文明進步的證據)
Boitani, L. and Francisci, F. and Ciucci, P. and Andreoli, G., 1995, “Population biology and ecology of feral dogs in central Italy,” in The domestic dog: Its evolution, behavior and interactions with people, edited by J. Serpell, Cambridge, England: Cambridge University Press, pp. 217-244.(從狗能了解人的肢體語言以及其促進與人類的互動關係,說明狗是目前全地球除人類以外最具有演化優勢之物種)
Brown, Sue-Ellen, 2004, “The Human-Animal Bond and Self Psychology: Toward a New Understanding”, Society & Animal Journal of Human-Animal Studies 12: 67-86.
Hazel, Susan J., Signal, Tania D. and Taylor, Nicola, 2011, “Can Teaching Veterinary and Animal-Science Students about Animal Welfare Affect Their Attitude toward Animals and Human-Related Empathy?” J. Vet. Med. Edu. 38: 74-83.