NOWAK, Zdzisław, Katarzyna KOWALCZYK-GAJEWSKA, Marcin NOWAK, and Paweł SZEPTYNSKI. 2023. “In Memoriam Prof. Ryszard Pęcherski, 1949–2022”. Engineering Transactions 71 (1): 141–156. https://doi.org/10.24423/EngTrans.3142.20230330.