C. Llanos Reyes and J. Tébar Hurtado, “The trade union response to labor flexibilization in the union press of Spain and the Federal Republic of Germany: the cases of IG Metall and Comisiones Obreras (CC.OO.)”, Cuad. relac. labor., vol. 44, no. 2, pp. 353–375, Nov. 2025, doi: 10.5209/crla.97559.