Tkaczyk, E. “Judgement of the Constitutional Tribunal Relating to an Invalid Regulation. A Gloss to the Decision of the Constitutional Tribunal of 30 October 2019, File No. P 1/18 (Journal of Laws, Item 2196)”. The Opole Studies in Administration and Law, vol. 18, no. 3, Dec. 2020, pp. 155-6, doi:10.25167/osap.2594.