BOYANOV, Kalin. PROSPECTS FOR THE DEVELOPMENT OF ADDITIONAL PROFESSIONAL EDUCATION OF CIVIL SERVANTS IN BULGARIA. KNOWLEDGE - International Journal , [S. l.], v. 55, n. 6, p. 1169–1174, 2022. Disponível em: https://ojs.ikm.mk/index.php/kij/article/view/5843. Acesso em: 30 apr. 2026.