ДУЦЬ-ФАЙФЕР, О. Pysma – dokumentŷ Svitovoho Kongresu Rusyniv i Svitovoj Radŷ Rusyniv (1991-2019). Rocznik Ruskiej Bursy, [S. l.], v. 15, p. 17–89, 2019. Disponível em: https://journals.akademicka.pl/rrb/article/view/1158. Acesso em: 24 jul. 2024.