PULUNGAN, Eska Dwipayana. The Widening of European Union to Post Soviet Countries: Case Study of Bulgaria Acceptance and Ukraine Accession. Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton, [S. l.], v. 9, n. 3, p. 790–801, 2023. DOI: 10.35326/pencerah.v9i3.2922. Disponível em: https://jurnal-umbuton.ac.id/index.php/Pencerah/article/view/2922. Acesso em: 19 jul. 2025.