Olszanowski, Jan, and Wojciech Piątek. “The Validity of the Principle of Mutual Trust Between the EU Member States in Mutual Assistance for the Recovery of Public Claims”. Przegląd Prawniczy Uniwersytetu im. Adam Mickiewicza 6 (December 15, 2016): 91–102. Accessed March 29, 2024. https://pressto.amu.edu.pl/index.php/ppuam/article/view/7173.