“The Extreme Legal Complexity of Administrative Files to Which the European Union Regulations on the Coordination of the National Social Security Systems of the Member States Apply: An Inductive Analysis of Portuguese Case Law Compared With Spanish Law on the Subject”. Revista de Derecho de la Seguridad Social, Laborum, no. 46, Mar. 2026, pp. 121-30, https://revista.laborum.es/index.php/revsegsoc/article/view/1277.