TSEPENDA, Igor. Ukraine and Poland: Facing the 21st Century Challenges. Journal of Vasyl Stefanyk Precarpathian National University, [S. l.], v. 1, n. 4, p. 21–26, 2014. DOI: 10.15330/jpnu.1.4.21-26. Disponível em: https://journals.pnu.edu.ua/index.php/jpnu/article/view/2293. Acesso em: 4 may. 2024.