“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)”, revsegsoc, no. 36, pp. 125–130, Sep. 2023, Accessed: Nov. 06, 2026. Available: https://revista.laborum.es/index.php/revsegsoc/article/view/727