CHAJKOWSKA, K. The Security System of the United Nations (A Theoretical Approach). Acta Agraria Debreceniensis, [S. l.], n. 45, p. 51–56, 2012. DOI: 10.34101/actaagrar/45/2392. Disponível em: https://ojs.lib.unideb.hu/actaagrar/article/view/2392. Acesso em: 21 oct. 2021.