Pączek, Marcin. “EU Citizenship and the Member states’ Own Competence Regulating the Conditions of Obtaining or Forfeiting National Citizenship”. The Opole Studies in Administration and Law 17, no. 4 (January 27, 2020): 107–126. Accessed November 21, 2024. https://czasopisma.uni.opole.pl/index.php/osap/article/view/1892.