TODOROVA, Svetlana Ivanova. Unemployment and job vacancies. Theoretical model and empirical analysis for Bulgaria. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, [S. l.], v. 4, n. 1, p. 40–54, 2020. DOI: 10.29114/ajtuv.vol4.iss1.165. Disponível em: https://aj.tu-varna.bg/index.php/ajtuv/article/view/165. Acesso em: 2 oct. 2025.