1. Latane, B., & Darley, J. M. (1968). Group Inhibition of Bystander Intervention in Emergencies. Journal of Personality & Social Psychology. 10(3): 215–221.
2. Hortensius, R., & de Gelder, B. (2018). From Empathy to Apathy: The Bystander Effect Revisited. Current Directions in Psychological Science. 27(4): 249-256.