KAPPELER, S.; SIMONI, H. Development of prosocial behavior in the two first years of life. Swiss Journal of Educational Research, [S. l.], v. 31, n. 3, p. 603–624, 2009. DOI: 10.24452/sjer.31.3.4821. Disponível em: https://sjer.ch/article/view/4821. Acesso em: 27 apr. 2024.