Research and Analysis of Coal Volatile Matter and Calorific Value Based on Laser-Induced Breakdown Spectroscopy. X-Disciplinarity, [S. l.], v. 1, n. 3, p. 5, 2025. DOI: 10.63174/xdi.SOBF9341. Disponível em: https://www.instipub.com/xdi/article/view/51. Acesso em: 6 jun. 2026.