• Bandura et al. (aggression)
  • Fagen et al. (elephant learning)
  • Saavedra and Silverman (button phobia)

Bandura, A, Ross, D and Ross, S A (1961), Transmission of aggression through imitation of aggressive models. Journal of Abnormal and Social Psychology, 63(3): 575–82

Fagen, A, Acharya, N and Kaufman, G E (2014), Positive Reinforcement Training for a Trunk Wash in Nepal’s Working Elephants: Demonstrating Alternatives to Traditional Elephant Training Techniques. Journal of Applied Animal Welfare Science, 17(2): 83–97

Saavedra, L M and Silverman, W K (2002), Case study: disgust and a specific phobia of buttons. Journal of the American Academy of Child and Adolescent Psychiatry, 41(11): 1376–79