CHOCHOVA, M. Some Questions Regarding the Grounds and Procedure for Declaring the Invalidity of a Collective Employment Agreement. Yearbook of the Law Department, [S. l.], v. 10, n. 11, p. 224–235, 2021. DOI: 10.33919/yldnbu.21.10.11. Disponível em: https://ojs.nbu.bg/index.php/YLD/article/view/743. Acesso em: 14 may. 2024.