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. (2024). Revista de Derecho de la Seguridad Social, Laborum, 39, 13-32. https://revista.laborum.es/index.php/revsegsoc/article/view/971