BARKALOVA, I. Theoretical perspective of the development of "European idea": "Europe of concentrative circles" and "Europe of variable geometry". Skhid, [S. l.], n. 3(129), 2014. DOI: 10.21847/1728-9343.2014.3(129).27470. Disponível em: http://skhid.kubg.edu.ua/article/view/27470. Acesso em: 21 may. 2022.