Nowak, Piotr Grzegorz. “Reducing Organ Shortage. Active Donor Registration System As an Alternative to the Polish Opt-Out System (in Polish)”. Diametros, no. 44 (June 19, 2015): 56–77. Accessed May 25, 2022. https://diametros.uj.edu.pl/diametros/article/view/673.