BARRETT, L. B. . The Potential ESCO Market: Over $320 Billion. Distributed Generation & Alternative Energy Journal, [S. l.], v. 14, n. 2, p. 12–15, 1999. DOI: 10.13052/dgaej2156-3306.1422. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14697. Acesso em: 2 jul. 2026.