HOLUBCIK, M. Theoretical knowledge in terms of forming cooperation. New Trends and Issues Proceedings on Humanities and Social Sciences, [S. l.], v. 3, n. 4, p. 88–95, 2017. DOI: 10.18844/prosoc.v3i4.1517. Disponível em: https://un-pub.eu/ojs/index.php/pntsbs/article/view/1517. Acesso em: 6 may. 2024.