ETIOPE, Giuseppe. Natural hydrogen (H2), a new C-free energy resource? Prospectives and uncertainties. Miscellanea INGV, [S. l.], v. 77, p. 49–50, 2024. DOI: 10.13127/misc/77/16. Disponível em: https://www.cs.ingv.it/collane/index.php/mi/article/view/274. Acesso em: 15 aug. 2025.