“On Amicus Curiae and the Participation of Trade Unions in Appeals of Unconstitutionality: Commentary to Order of the Constitucional Court 125 2022, of September 29. Concerning the Action of Unconstitutionality Num. 2191-2022”. Journal of the Cortes Generales, no. 115, June 2023, pp. 453-92, https://doi.org/10.33426/rcg/2023/115/1761.