BALBUZA, Katarzyna. A memoir about Dr. Ryszard Piasek – a Poznań filmmaker. Historia i Świat, [S. l.], v. 12, p. 495–498, 2023. DOI: 10.34739/his.2023.12.32. Disponível em: https://czasopisma.uph.edu.pl/historiaswiat/article/view/3470. Acesso em: 14 cze. 2024.