YANGYOZOV, Petko. THE FORMATION OF THE HUMAN CAPITAL CONCEPT: A STAGE IN THE HUMAN CAPITAL THEORY DEVELOPMENT. KNOWLEDGE - International Journal , [S. l.], v. 74, n. 1, p. 51–56, 2026. Disponível em: http://ojs.ikm.mk/index.php/kij/article/view/8057. Acesso em: 18 apr. 2026.