Opora, Robert, and Marta Pięta-Chrystofiak. “What Have We Learned about the Supervision of Probation Officers in Connection With the Outbreak of the COVID-19 Pandemic?”. Resocjalizacja Polska, no. 26 (February 2, 2024): 157-153. Accessed July 10, 2026. https://resocjalizacjapolska.pl/index.php/rp/article/view/485.