BURGIS, E. .; RYAN, W. A. . New Natural Gas Technologies for Enhancing the Indoor Environment. Distributed Generation & Alternative Energy Journal, [S. l.], v. 21, n. 4, p. 6–32, 2006. DOI: 10.13052/dgaej2156-3306.2141. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14283. Acesso em: 14 may. 2026.