BARRETT, L. B. . Turning Backup Generators into Green Engines with Biodiesel. Distributed Generation & Alternative Energy Journal, [S. l.], v. 20, n. 2, p. 70–74, 2005. DOI: 10.13052/dgaej2156-3306.2025. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14373. Acesso em: 14 may. 2026.