NOWAK, Zdzisław; KOWALCZYK-GAJEWSKA, Katarzyna; NOWAK, Marcin; SZEPTYNSKI, Paweł. In Memoriam Prof. Ryszard Pęcherski, 1949–2022. Engineering Transactions, [S. l.], v. 71, n. 1, p. 141–156, 2023. DOI: 10.24423/EngTrans.3142.20230330. Disponível em: https://et.ippt.pan.pl/index.php/et/article/view/3142. Acesso em: 25 jul. 2025.