KOSAŁA, Krzysztof. Prof. Zbigniew Witold Engel - Doctor Honoris Causa of the Cracow University of Technology. Archives of Acoustics, [S. l.], v. 31, n. 3, p. 347–349, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/679. Acesso em: 25 apr. 2025.