Effect of Gaseous Pollutants (NO 2 , SO 2 and O 3) on Cultural Heritage Materials: A Case of MFAs in Brussels, Belgium. Global Journal of Science Frontier Research, [S. l.], v. 18, n. A7, p. 29–33, 2018. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/2330. Acesso em: 14 aug. 2026.