SKUJIENĖ, Grita. Evolutionary Ethics: Searching for the Sources of Altruism. Problemos, [S. l.], v. 57, p. 76–88, 2000. DOI: 10.15388/Problemos.2000.57.6823. Disponível em: https://journals.vu.lt./problemos/article/view/6823. Acesso em: 27 apr. 2025.