“The Subjective Scope of Voluntary Improvements in Social Security: Unequal Treatment Between Workers. Comment on Supreme Court Ruling 877 2022, of 31 October (appeal 50 2019)”. Revista de Derecho de la Seguridad Social, Laborum, no. 36 (September 29, 2023): 125–130. Accessed November 6, 2026. https://revista.laborum.es/index.php/revsegsoc/article/view/727.