FRASER, K. D. . Be Careful... Of Fully Bundled Energy Services. Distributed Generation & Alternative Energy Journal, [S. l.], v. 15, n. 4, p. 46–48, 2000. DOI: 10.13052/dgaej2156-3306.1546. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14629. Acesso em: 2 jul. 2026.