“RETA Y SETA. The Increase of 20 % in the Permanent Total Qualified Disability and His Possible Unconstitutionality in the Requirements of Access”. Revista de Derecho de la Seguridad Social, Laborum, no. 11 (May 5, 2017): 51–62. Accessed November 6, 2026. https://revista.laborum.es/index.php/revsegsoc/article/view/167.