Duda-Hyz, Michalina. “The Proposed Polish Advertisement Levies – An Efficient Source of Public Income or Instruments of the Political Battle?”. Review of European and Comparative Law 50, no. 3 (September 9, 2022): 219–237. Accessed April 29, 2024. https://czasopisma.kul.pl/index.php/recl/article/view/13039.