K. KOSAŁA, “Prof. Zbigniew Witold Engel - Doctor Honoris Causa of the Cracow University of Technology”, Arch. Acoust., vol. 31, no. 3, pp. 347–349, Sep. 2006, Accessed: Mar. 04, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/679