“Leon Tyszkiewicz, Doktryny i ruch "Obrony społecznej" we współczesnym prawie karnym [Doctrines and the Movement of ‘Social Defense’ in Modern Penal Law], Poznań 1968, 343 pages, Adam Mickiewicz University, Publication of the Law Department” (1971) Contemporary Central & East European Law, (15), pp. 47–50. Available at: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1510 (Accessed: 6 October 2025).