FRĄCZEK, A.; KONOPKA, K.; SMULCZYK, M. Sex and country related specificity of readiness for aggression among adolescents. Przegląd Badań Edukacyjnych (Educational Studies Review), [S. l.], v. 2, n. 17, p. 87–97, 2014. DOI: 10.12775/PBE.2013.014. Disponível em: https://apcz.umk.pl/PBE/article/view/PBE.2013.014. Acesso em: 6 dec. 2021.