“The Content of the Collective Agreement: Between Precedents and Change. A Contribution to the Analysis of the Matters Subject to Collective Bargaining Made by Professor Borrajo Dacruz”. Revista de Derecho de la Seguridad Social, Laborum, Feb. 2023, pp. 129-38, https://revista.laborum.es/index.php/revsegsoc/article/view/680.