WINKLER–SKALNA, Agnieszka. Propagation of Soundwaves in Uncertain Environment – New Interval Perturbation Methodology. Archives of Acoustics, [S. l.], v. 33, n. 4(S), p. 171–176, 2008. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/854. Acesso em: 13 may. 2025.