Keller, Monika Center for Adaptive Behavior and Cognition, Max Planck Institute for Human Development, Max Planck Society;
Gummerum, M., & Keller, M. (2012). East German children's and adolescents friendship and moral reasoning before and after German reunification. Journal of Genetic Psychology, 173(4), 440-462. doi:10.1080/00221325.2011.630435.