ENGEL, Zbigniew; KOSAŁA, Krzysztof. Index method of the acoustic quality assessment of sacral buildings. Archives of Acoustics, [S. l.], v. 32, n. 3, p. 455–474, 2007. Disponível em: https://acoustics.ippt.gov.pl/index.php/aa/article/view/701. Acesso em: 4 mar. 2026.