“Have alternative social security mutualities to the RETA reached their lowest point? The mandatory inclusion of self-employed professional groups in the RETA ‘system’ is seen as a logical step within the overall Social Security framework”, revsegsoc, no. 39, pp. 13–32, Jun. 2024, Accessed: Nov. 06, 2026. Available: https://revista.laborum.es/index.php/revsegsoc/article/view/971