WALTZ, J. P. . Investment Grade Energy Audits ... Fact? Or Fiction?. Distributed Generation & Alternative Energy Journal, [S. l.], v. 14, n. 4, p. 9–19, 1999. DOI: 10.13052/dgaej2156-3306.1442. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14661. Acesso em: 3 jun. 2026.