BRADLEY, D. R. L. . Energy Realities. Distributed Generation & Alternative Energy Journal, [S. l.], v. 14, n. 4, p. 63–65, 1999. DOI: 10.13052/dgaej2156-3306.1446. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14669. Acesso em: 6 may. 2026.