CASTEN, S. .; O’BRIEN, T. . APPROACHING FREE ELECTRICITY: H OW THE REAL W ORLD D IFFERS FROM THERMODYNAMIC MODELS. Distributed Generation & Alternative Energy Journal, [S. l.], v. 18, n. 1, p. 7–25, 2003. DOI: 10.13052/dgaej2156-3306.1811. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14457. Acesso em: 14 may. 2026.