C. N. Roales-Nieto and R. J. M. de B. Pereira, “The trade union freedom of foreigners with no authorization to work”, MIG, no. 18, pp. 199–215, Nov. 2014, Accessed: Aug. 11, 2026. [Online]. Available: https://revistas.comillas.edu/revistamigraciones/article/view/3050