B. J. Casey et al., “From the Cover: Behavioral and Neural Correlates of Delay of Gratification 40 Years Later,” PNAS 108 (2011): 14998; N. Eisenberg et al., “Contemporaneous and Longitudinal Prediction of Children’s Social Functioning from Regulation and Emotionality,” Child Development 68 (1997): 642; N. Eisenberg et al., “The Relations of Regulation and Emotionality to Resiliency and Competent Social Functioning in Elementary School Children,” Child Development 68 (1997): 295.