GRUSHECKYI, B.P. The role of nongovernmental organizations in Bulgaria’s foreign policy mechanism. Public Administration and Civil Service, Нур-Султан, Казахстан, n. 3, p. 238–245, 2014. Disponível em: https://journal.apa.kz/index.php/path/article/view/485. Acesso em: 31 jan. 2026.