Valentim, Joaquim Pires. «Sherif’s Theoretical Concepts and Intergroup Relations Studies: Notes for a Positive Interdependence». Psychologica0, no. 52-II (Junho 1, 2010): p. 585-598. Acedido Agosto 31, 2025. https://impactum-journals.uc.pt/psychologica/article/view/1647-8606_52-2_25.