N. Eisenberg, and R. Lennon, Altruism and the assessment of empathy in the preschool years, Child Development, vol.51, pp.552-557, 1980.
N. D Feshbach, and K. Roe, Empathy in six- and seven-year-olds, Child Development, vol.39, pp.133-145, 1986.
C. Zahn-Waxler, M. Radke-Yarrow, E. Wagner, and M. Chapman, Development of concern for others, Developmental Psychology, vol.28, pp.126-136, 1992.
A. Vaish, M. Carpenter, and M. Tomasello, Sympahy through affective perspective taking and its relation to prosocial behavior in toddlers, Developmental Psychology, vol.45, pp.534-543, 2009.
A, Vaish, M. Missana, and M. Tomasello, Three-year-old children intervene in third-party moral transgressions, British Journal of Developmental Psychology, vol.29, pp.124-130, 2011.